The SnackIQ Glossary

An algorithm is a step-by-step set of instructions or rules for solving a problem or completing a task. Every computer program is ultimately a collection of algorithms.

When an AI system reflects the biases of its creators or training data, producing outputs that systematically favour or disadvantage certain groups.

The amygdala is an almond-shaped structure deep in the brain that processes emotions — particularly fear and threat — and triggers the body's rapid stress response before the rational brain has time to react.

Anchoring bias is the tendency to rely too heavily on the first piece of information encountered (the "anchor") when making decisions, even if that information is irrelevant or arbitrary.

An API (Application Programming Interface) is a set of rules that allows different software applications to communicate with each other. It defines what requests can be made, how to make them, and what responses to expect.

Arbitrage is the practice of exploiting price differences for the same asset in different markets, buying low in one place and simultaneously selling high in another for a risk-free profit.

The simulation of human intelligence processes by machines — including learning, reasoning, and self-correction — to perform tasks that typically require human cognition.

The branch of astronomy that applies the laws of physics to understand the nature, behaviour, and evolution of stars, galaxies, and the universe itself.

Augmented reality (AR) overlays digital information — images, text, 3D objects — onto the real world as seen through a device's camera or a headset, blending physical and digital environments.

Automation is the use of technology to perform tasks with minimal human involvement — replacing repetitive, rule-based human labour with machines, software, or AI.

A cognitive error where you ignore general statistics about how common something is and focus instead on specific details, leading you to misjudge the real odds. You focus on the vivid story and forget the baseline number.

A bear market is a period when asset prices fall 20% or more from recent highs, driven by widespread pessimism and selling. It is the opposite of a bull market.

The study of how psychological, cognitive, emotional, and social factors influence the economic decisions of individuals and institutions — often irrationally.

A black hole is a region of spacetime where gravity is so extreme that nothing — not even light — can escape once it crosses the event horizon. They form when massive stars collapse at the end of their lives.

A decentralised digital ledger that records transactions across many computers simultaneously. Once recorded, data cannot be altered without changing all subsequent blocks.

A bond is a loan that an investor makes to a borrower — typically a government or corporation — in exchange for regular interest payments (a coupon) and the return of the principal at a set maturity date.

Bootstrapping means starting and growing a business using only personal savings, revenue from the business itself, and minimal external funding — without taking investment from outside investors.

A bull market is a sustained period of rising asset prices — typically a rise of 20% or more — fuelled by investor confidence, strong economic data, and optimism.

A capital gain is the profit you make when you sell an asset for more than you paid for it. Governments typically tax capital gains, often at a different rate than income tax.

A carbon footprint is the total amount of greenhouse gases — primarily carbon dioxide and methane — produced directly or indirectly by an individual, organisation, product, or event, measured in tonnes of CO₂ equivalent.

Churn rate is the percentage of customers who stop using a product or service during a given period. High churn means a business must constantly replace lost customers just to stay still.

A circular economy is an economic model designed to eliminate waste by keeping products, components, and materials in use for as long as possible through reuse, repair, remanufacturing, and recycling.

Long-term shifts in global temperatures and weather patterns. While natural factors play a role, since the 1800s human activities — primarily burning fossil fuels — have been the main driver.

Cloud computing means accessing computing resources — servers, storage, software, databases — over the internet on demand, rather than owning and running them yourself.

A systematic pattern of deviation from rationality in judgment. These mental shortcuts help the brain process information quickly — but often mislead us in complex decisions.

Cognitive dissonance is the mental discomfort felt when holding two contradictory beliefs, or when your actions conflict with your values — and the mental gymnastics used to resolve it.

Interest calculated on both the initial principal and the accumulated interest from previous periods, creating exponential growth over time.

Confirmation bias is the tendency to search for, interpret, and remember information in a way that confirms your existing beliefs, while ignoring contradictory evidence.

Correlation means two things tend to change together. Causation means one thing directly causes the other. Confusing the two is one of the most common — and costly — errors in reasoning.

Cortisol is the body's primary stress hormone, released by the adrenal glands in response to stress and low blood sugar. It triggers the "fight or flight" response and plays a key role in metabolism.

CRISPR-Cas9 is a gene editing tool derived from a bacterial immune system that acts like molecular scissors — it can locate a specific DNA sequence and cut, correct, or replace it with precision.

The science of securing information by transforming it into an unreadable format (encryption) so only authorised parties can decode it. The backbone of all digital privacy and security.

Customer Lifetime Value (CLV or LTV) is the total revenue a business can expect from a single customer throughout the entire duration of their relationship. It guides how much it makes sense to spend to acquire each customer.

Cybersecurity is the practice of protecting computers, networks, programs, and data from digital attack, theft, or damage. It encompasses everything from passwords to national infrastructure defence.

Dark energy is a mysterious force that makes up approximately 68% of the total energy content of the universe and is causing the universe's expansion to accelerate rather than slow down.

A hypothetical type of matter that does not emit light or energy, yet accounts for approximately 85% of all matter in the universe based on its gravitational effects.

Deep learning is a type of machine learning that uses artificial neural networks with many layers to learn patterns from vast amounts of data, enabling tasks like image recognition, translation, and voice synthesis.

A sustained decrease in the general price level of goods and services — the opposite of inflation. While cheaper prices sound appealing, deflation typically signals and worsens economic distress.

Disruption in business describes how a smaller company with fewer resources can challenge and eventually overturn established industry leaders by starting at the low end of the market and then moving upmarket.

DNA (Deoxyribonucleic Acid) is the molecule inside every living cell that carries genetic instructions for the development, functioning, growth, and reproduction of all known living organisms.

A strategy where you invest a fixed amount of money at regular intervals (weekly, monthly, or yearly) regardless of whether prices are high or low. This removes the pressure of timing the market perfectly and reduces the impact of market volatility on your average purchase price.

Dopamine is a neurotransmitter — a chemical messenger in the brain — that plays a central role in motivation, reward-seeking, and the anticipation of pleasure rather than pleasure itself.

The Dunning-Kruger effect is a cognitive bias where people with limited knowledge in a domain overestimate their competence, while true experts often underestimate theirs.

Economies of scale occur when increasing the volume of production lowers the average cost per unit, because fixed costs are spread over more output and bulk purchasing power improves.

An ecosystem is a community of living organisms — plants, animals, fungi, bacteria — interacting with each other and with their physical environment (soil, water, air) as an interconnected system.

Emergence is when a system's behaviour as a whole cannot be predicted from its individual parts alone. Complex patterns and properties arise from simple interactions, creating something genuinely new that didn't exist before.

Money you set aside in a liquid, easily accessible account to cover unexpected expenses like car repairs, medical bills, or job loss. Typically 3–6 months of living expenses, kept separate from your regular spending money and investments.

Emotional intelligence (EQ) is the ability to recognise, understand, manage, and effectively use emotions — both your own and those of others.

A measure of the disorder or randomness in a system. The second law of thermodynamics states that entropy in a closed system always increases — the universe constantly moves towards disorder.

The study of changes in gene expression that do not involve alterations to the DNA sequence itself — meaning your environment, behaviour, and experiences can switch genes on or off.

Epistemology is the branch of philosophy concerned with knowledge — what it is, where it comes from, and what the limits of human knowledge are. It asks: "How do you know what you know?"

Existentialism is the philosophical view that individuals are radically free and responsible for creating their own meaning and identity through their choices and actions, in a universe that offers no inherent purpose.

Exponential growth occurs when the rate of increase is proportional to the current value — meaning the bigger something gets, the faster it grows. Growth compounds on itself.

The apparent contradiction between the high probability of extraterrestrial civilisations existing in the universe and the complete lack of evidence for, or contact with, any such civilisations.

Money that a government has declared to be legal tender, but is not backed by a physical commodity like gold. Its value derives entirely from government decree and public trust.

Fine-tuning is the process of taking a pre-trained AI model and training it further on a smaller, specialized dataset to make it better at a specific task. It's like teaching a well-educated person a new skill by giving them targeted practice in one area.

Fiscal policy is how governments use taxation and public spending to influence the economy. Raising taxes or cutting spending slows the economy; cutting taxes or increasing spending stimulates it.

A fixed mindset is the belief that intelligence, talent, and abilities are innate and unchangeable — that you are either "good at" something or you are not, and effort cannot significantly change that.

Flow is a state of complete immersion and energised focus in an activity, where time seems to disappear and performance peaks. It occurs when challenge and skill are perfectly balanced.

The framing effect is when people react differently to the same choice depending on how it's presented to them. Your decision changes based on whether information is framed as a gain or a loss, even though the facts are identical.

The tendency to make different decisions based on how information is presented to you, even when the actual facts are identical. Your brain reacts differently to 'glass half full' versus 'glass half empty' even though it's the same glass.

The mathematical study of strategic decision-making between rational agents, where the outcome for each depends on the choices of all. Used to model competition, cooperation, and conflict.

Gross Domestic Product — the total monetary value of all goods and services produced within a country in a given period. The world's primary measure of economic size and growth.

Gene editing is the ability to make precise changes to the DNA of a living organism — inserting, removing, or modifying specific sequences to alter traits or treat disease.

A growth mindset is the belief that intelligence, talent, and abilities can be developed through effort, good strategies, and learning from feedback — as opposed to being fixed traits.

A hedge fund is a private investment partnership that uses a wide range of complex strategies — including short selling, leverage, and derivatives — to generate returns regardless of market direction.

Mental shortcuts or rules of thumb that allow people to make quick decisions with limited information. Efficient but prone to systematic errors when applied in the wrong context.

A proposed explanation for a phenomenon, made on the basis of limited evidence, that can be tested through further investigation. The starting point of the scientific method.

Imposter syndrome is the persistent internal experience of feeling like a fraud — believing your success is undeserved and fearing that others will eventually "find you out," despite clear evidence of competence.

An index fund is a type of investment that tracks a market index — like the S&P 500 — by holding the same stocks in the same proportions. It requires no active management.

The rate at which the general level of prices for goods and services rises, eroding purchasing power over time. Central banks typically target 2% annual inflation as economically healthy.

An interest rate is the cost of borrowing money, expressed as a percentage of the loan amount per year. Central banks set base rates that influence all lending in an economy.

The Internet of Things (IoT) refers to the network of physical devices — thermostats, cars, fridges, wearables — embedded with sensors and software that connect to the internet and exchange data.

An IPO is the process by which a private company first sells its shares to the public on a stock exchange, converting private ownership into publicly tradeable equity.

A production and inventory strategy that aligns raw material orders with production schedules, receiving goods only as they are needed — minimising waste and storage costs.

An economic theory holding that government spending and tax policy should be used to stabilise output over the business cycle — especially during recessions, when private demand is insufficient.

A neurological phenomenon where repeated exposure to a stimulus (like stress or seizures) makes your brain increasingly sensitive to that stimulus over time, requiring less and less to trigger a response. Each exposure 'lowers the threshold' for the next.

A psychological state where someone stops trying to improve their situation because they've repeatedly failed in the past and now believe they're powerless to change it. Even when opportunities come along, they don't take them.

Leverage means using borrowed money to amplify potential investment returns. It multiplies both gains and losses relative to the actual capital you put in.

Liquidity refers to how easily an asset can be converted into cash without significantly affecting its price. Cash is the most liquid asset; a house is relatively illiquid.

The cognitive tendency to prefer avoiding losses over acquiring equivalent gains. Research shows losses feel approximately twice as painful as equivalent gains feel pleasurable.

A structural advantage that makes it difficult for competitors to catch up or overtake a company, even if that competitor has more resources or better technology. Named after castle moats, which protected against invasion—stronger moats mean the company's market position is more defensible.

A subset of artificial intelligence where systems learn from data and improve their performance over time without being explicitly programmed for each task.

The additional satisfaction gained from consuming one more unit of a good or service. Marginal utility typically diminishes with each additional unit consumed.

Market capitalisation (market cap) is the total value of all a company's outstanding shares — calculated by multiplying the share price by the number of shares. It measures a company's size.

The complete collection of microorganisms — bacteria, fungi, viruses — living in and on the human body. The gut microbiome alone contains approximately 38 trillion microorganisms.

Mindfulness is the practice of deliberately paying attention to the present moment — your thoughts, feelings, and surroundings — with curiosity and without judgement.

Monetary policy is how central banks manage the money supply and interest rates to control inflation and support economic growth. The main tool is setting the base interest rate.

Multimodal AI is an artificial intelligence system that can process and understand multiple types of input—like text, images, audio, and video—all in one model. Instead of having separate AI systems for each type of data, multimodal AI learns patterns across all of them together.

A Minimum Viable Product is the simplest version of a product that delivers enough value for early customers to use it and provide feedback, without building everything you ultimately envision.

Natural selection is the process by which organisms with traits better suited to their environment survive, reproduce, and pass those traits to offspring, gradually shifting the characteristics of a species over generations.

A financial metric that calculates the value today of a future stream of cash flows, adjusted for the time value of money. The primary tool for evaluating investment decisions.

Network effects occur when a product or service becomes more valuable to each user as more people use it. The value grows exponentially with each additional participant.

An artificial neural network is a computational system loosely inspired by the brain, made of interconnected layers of mathematical "nodes" that process information and learn from data.

The brain's lifelong ability to reorganise itself by forming new neural connections in response to learning, experience, or injury.

An NFT (Non-Fungible Token) is a unique digital certificate of ownership stored on a blockchain that proves you own a specific digital item — an image, video, piece of music, or any digital file.

Nudge theory proposes that subtle changes to how choices are presented — default options, framing, social norms — can predictably alter behaviour without restricting freedom or using financial incentives.

Open source software is code that is publicly available for anyone to view, use, modify, and distribute. It is built collaboratively by global communities rather than private teams.

The value of the next-best alternative you give up when you make a choice. Every decision has an opportunity cost — choosing one option means forgoing everything else you could have done with those same resources.

Osmosis is the movement of water molecules through a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration, until equilibrium is reached.

A hormone and neurotransmitter produced in the hypothalamus, often called the "bonding hormone." It plays a key role in social bonding, trust, empathy, childbirth, and breastfeeding.

Passive income is money earned with minimal ongoing effort — from investments, royalties, rental properties, or businesses that run without your direct involvement.

The process by which plants, algae, and some bacteria convert light energy — usually from the sun — into chemical energy stored as glucose, using carbon dioxide and water.

A beneficial effect produced by a treatment that has no active therapeutic component — caused entirely by the patient's belief that the treatment will work.

Probability is a measure of how likely an event is to occur, expressed as a number between 0 (impossible) and 1 (certain), or equivalently as a percentage between 0% and 100%.

Product-market fit is the point when a product is so well-suited to what customers actually want that it sells itself through word-of-mouth. Growth accelerates naturally because demand far exceeds supply and customers are thrilled.

The skill of writing clear, specific instructions for AI systems (especially large language models like ChatGPT) to get better, more accurate, and more useful responses. The way you phrase your question dramatically changes the quality of the answer you receive.

Prospect theory describes how people evaluate potential gains and losses asymmetrically — losses feel roughly twice as painful as equivalent gains feel pleasurable. It is the foundation of modern behavioural economics.

A monetary policy tool where a central bank creates new money electronically to buy government bonds and other financial assets — injecting liquidity into the economy to stimulate growth.

Quantum computing uses the principles of quantum mechanics — superposition and entanglement — to process information in fundamentally different ways than classical computers, solving certain problems exponentially faster.

A quantum phenomenon where two particles become correlated so that measuring one instantly determines the state of the other, regardless of the distance between them.

A cognitive bias where you weight recent events much more heavily than older events when making decisions or judgments, even when the older information is more important. Your brain naturally assumes recent things are more relevant simply because they happened recently.

A recession is an economic downturn defined as two consecutive quarters of negative GDP growth. Jobs are lost, spending falls, and businesses cut back.

Einstein's two theories (Special, 1905; General, 1915) describing how space, time, and gravity work. Special relativity shows time and space are relative to the observer; General relativity describes gravity as the curvature of spacetime.

Renewable energy comes from naturally replenishing sources — solar, wind, hydro, geothermal, tidal — that are not depleted when used, unlike fossil fuels which take millions of years to form.

Resilience is the ability to adapt, recover, and grow in the face of stress, adversity, trauma, or significant challenge. It is not about avoiding difficulty — it is about bouncing back from it.

A technique that lets an AI system look up real information from a database or the internet before answering your question, rather than only relying on what it learned during training. It's like giving the AI access to a reference library mid-conversation.

Return on Investment (ROI) measures how much profit or loss an investment generates relative to its cost, expressed as a percentage. It is one of the most widely used metrics to evaluate financial decisions.

The process of identifying, assessing, and controlling threats to an organisation's capital, earnings, or strategic objectives — balancing the cost of mitigation against the probability and impact of outcomes.

Scarcity is the fundamental economic problem: there are unlimited human wants but limited resources to satisfy them. Every economic decision is ultimately a response to scarcity.

Serotonin is a neurotransmitter that regulates mood, sleep, appetite, and social behaviour. Low serotonin levels are associated with depression, anxiety, and impulsive behaviour.

Stagflation is the rare and painful combination of high inflation, slow economic growth, and high unemployment occurring simultaneously. It defies the usual economic trade-offs.

Standard deviation measures how spread out a set of values is around its average (mean). A low standard deviation means values cluster close to the mean; a high one means they are spread widely.

An ancient Greek philosophy teaching that virtue is the only true good, external events are indifferent, and happiness comes from accepting what lies outside our control and acting rightly within it.

The sunk cost fallacy is the tendency to continue investing in something (time, money, effort) simply because you have already invested in it — even when cutting your losses is the rational choice.

The sunk cost trap is the psychological tendency to continue investing time, money, or effort into something because you've already spent resources on it, even when it's no longer the best decision. Past costs should not influence future choices, but our brains treat them as if they should.

The economic model describing how the price of a good is determined by the interaction between its availability (supply) and consumer desire for it (demand). The foundation of market economics.

Survivorship bias is the logical error of focusing on entities that "survived" a selection process while overlooking those that did not, leading to false conclusions about what causes success.

Tax-loss harvesting is the practice of deliberately selling investments that have lost value to lock in those losses, then using them to offset gains elsewhere and reduce your taxable income. The goal is to minimize what you owe to the taxman while keeping your overall investment strategy intact.

A strategy where you deliberately sell an investment at a loss to offset capital gains you've made elsewhere, reducing the taxes you owe. The proceeds can often be immediately reinvested in a similar (but not identical) investment to maintain your portfolio.

The time value of money is the principle that money available now is worth more than the same amount in the future — because money today can be invested to earn returns, and future money is subject to inflation and uncertainty.

The phenomenon where individuals, acting in their own rational self-interest, deplete a shared resource — even when it is clear that doing so is against the long-term interest of everyone, including themselves.

In hypothesis testing, a Type I error is a false positive (concluding something is true when it isn't); a Type II error is a false negative (failing to detect something that is actually true).

A way of measuring whether a single sale or transaction is profitable by comparing how much it costs you to acquire a customer against how much profit you make from them. It's the foundation of whether your business model actually works.

Utilitarianism is the ethical theory that the morally right action is the one that produces the greatest good (happiness or well-being) for the greatest number of people.

The total satisfaction, benefit, or value that a consumer derives from consuming a good or service. The central concept in microeconomics for modelling human preferences and decision-making.

Luxury goods for which demand increases as the price rises — the opposite of normal goods. Higher prices signal higher status, making the product more desirable to status-conscious consumers.

A form of private equity investment provided by firms or funds to early-stage, high-growth-potential startups in exchange for equity. VC funds the high-risk, high-reward bets that build transformational companies.

Virtual reality (VR) is a fully immersive digital environment experienced through a headset that replaces your entire field of view with a computer-generated world.

Illegal trading activity where someone buys and sells the same asset to create false market activity and mislead other traders about how much the asset is actually being traded. It's market manipulation dressed up as legitimate trading.

Web3 is a vision for a decentralised version of the internet built on blockchain technology, where users own their data and digital assets rather than corporations controlling them.

The cognitive system that temporarily holds and manipulates information needed for complex tasks such as reasoning, comprehension, and learning. The brain's mental "scratchpad."

A technique used to determine the atomic and molecular structure of a crystal by analysing how X-rays diffract when beamed through it — revealing the arrangement of atoms in three dimensions.

Xenotransplantation is the transplantation of living cells, tissues, or organs from one species to another — particularly from genetically modified pigs to humans, as a solution to the global organ donor shortage.

In finance, yield is the income generated by an investment expressed as a percentage of its cost or current market value. It measures the return from dividends, interest, or rent relative to price.

A graph showing the relationship between interest rates and the maturity of bonds of similar credit quality. Its shape — normal, flat, or inverted — is one of the most powerful predictors of economic conditions.

Zero-based budgeting is a financial planning approach where every expense must be justified from scratch each period, starting from a "zero base" — rather than simply adjusting last year's budget.

A situation in which one participant's gain is exactly equal to another's loss — so the total value available does not change. Every poker game is zero-sum; most real-world economic interactions are not.

Zero-sum thinking is the cognitive bias of perceiving a situation as competitive when it does not have to be — assuming that one person's gain must come at the expense of another's loss.