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An area formally recognised for the quality of its night sky and protected by lighting policy — a designation that exists because artificial light at night has made genuinely dark skies rare across
Illness caused by reduced oxygen availability at altitude, and the single most important fact about it is that fitness does not protect you — it affects people unpredictably, and the main determinant
Because time zones are political decisions, not geographical ones — and a country free to choose its offset is free to choose one that does not align with an hour boundary. The underlying geography.
Who creates the holiday, who sells it, and who you have a contract with — and the last of those determines who is responsible when something goes wrong, which is the part that matters. Tour operator.
ETOPS governs how far a twin-engine aircraft may fly from a suitable diversion airport — and it is the reason transoceanic routes look the way they do, and why two engines replaced four. The original
Booking a flight to a destination beyond where you actually want to go, and getting off at the connection — exploiting the fact that a connecting itinerary is sometimes cheaper than the direct flight
A flight operated by an airline between two foreign countries, as part of a route originating in its own — and the resulting services are frequently the most interesting ones in aviation, because
Airlines sell many different fare classes within the same cabin, each with different rules — and the single letter in your booking determines what you may do far more than the price you paid
Because every single response requires substantial computation on expensive, power-hungry hardware — and unlike most software, the cost does not fall as usage grows, which breaks the economics people
By training a model to map one person's appearance or voice onto another's performance — and detection is possible but increasingly unreliable, which is why the response has shifted toward provenance
An agent pursues a goal over multiple steps, deciding what to do next and taking actions in the world; a chatbot responds to messages. The difference is autonomy and the ability to act rather than
No. Open weights means the trained model parameters are downloadable; open source, in its established meaning, requires considerably more — and the distinction is actively contested because a great
Where the computation happens — and the trade-off is between privacy, latency and offline capability on one side, and capability, scale and updatability on the other. Cloud AI. Your input is sent to
A way of recording where a piece of media came from and what was done to it, cryptographically attached to the file — an approach to the synthetic media problem that works in the opposite direction
An attack in which instructions hidden in content the model reads are followed as though they came from the user — and it is a genuinely unsolved problem, not a bug awaiting a patch. Why it exists. A
Three different ways of getting a model to work with particular information, differing enormously in cost, and frequently confused when people ask about "training it on our data". Pre-training.
A token is the unit a language model processes — roughly a word fragment — and the context window is how many tokens it can consider at once. Both determine cost, capability and the limits you run
Because a language model is trained to produce plausible continuations of text, not to state truths — and fluent plausible text and accurate text are different targets that usually coincide and
Obtain valid consent before storing or accessing non-essential information on a device — and most cookie banners do not meet the standard, which is why regulators across Europe have issued repeated
A personal data breach is any security incident leading to accidental or unlawful destruction, loss, alteration, unauthorised disclosure of, or access to personal data — which is considerably broader
An API key identifies an application; an OAuth token represents a user's authorisation for an application to act on their behalf. They answer different questions, and using one where the other is
What you are permitted to do with the software, and — critically for the last of them — what you must do if you distribute your own version. Proprietary. The copyright holder grants a limited licence
Telemetry is automatically collected data about how software and hardware are behaving, sent back to the developer. It ranges from genuinely necessary diagnostics to detailed behavioural tracking,
Single sign-on (SSO) means one authentication grants access to many applications, with the applications never seeing your credentials. A password manager stores many separate passwords and enters
How much of the stack someone else operates. Each model draws the line in a different place, and what falls on your side determines both your workload and your responsibility. Infrastructure as a
Whether the data can still be linked back to a person. Anonymised data cannot, and falls outside data protection law entirely. Pseudonymised data can, with additional information, and remains fully
A right of access under data protection law allowing anyone to ask an organisation what personal data it holds about them, and to receive a copy — and the scope is wider than most organisations
Who decides what happens to the data. The controller determines the purposes and means of processing; the processor acts on the controller's instructions. The distinction sets who carries which legal
Because a play-off manufactures a decisive, high-stakes single event at the end of the season — which is commercially valuable and dramatically satisfying, even though it is a worse method of
Through a process that has changed substantially — from a slow, permanent-programme model to one where host cities propose additional sports for their own Games, which has made the programme far more
A player's registration is temporarily transferred to another club while the parent club retains their contract — a mechanism that serves quite different purposes for each party. The basic structure.
Both use rolling money-based rankings rather than points awarded for results — a system that behaves quite differently from the points-based rankings used in tennis or golf. The money ranking
Crews race side by side over a set distance, in boats classified by number of rowers, number of oars each, and whether there is a coxswain — and the notation on a results sheet encodes all of it.
Leaving the blocks before the gun, or reacting faster than a human physiologically could — and the second definition is the one that surprises people, because a runner can be disqualified while still
Because equipment can shift the balance between athlete and technology, and governing bodies intervene when the performance gain begins to look like it belongs to the manufacturer rather than the
The population of performances each is drawn from, and the conditions under which each may be set — which is why they can differ substantially and why an Olympic record is frequently slower than the
Because weight confers a direct, mechanical advantage in the specific sports that use classes, and it is the only body attribute that is both decisive and adjustable — while height, though frequently
Multiple synchronised cameras track the ball, software reconstructs its three-dimensional flight path, and the system predicts where it went — including, critically, where it would have gone had
Yes, but less straightforwardly than the popular account suggests — and the most effective protocol is the opposite of simply moving somewhere high. The physiological basis. At altitude, air pressure
By determining, automatically and within a second, whether the whole of the ball has crossed the whole of the goal line — a decision that is frequently impossible for a human to make from any
Not that every option is equally good — that is neither achievable nor desirable — but that no option dominates so completely that the others become pointless, and that skilled play is rewarded more
A game that changes permanently as you play a campaign — stickers are applied, cards are destroyed, rules are rewritten in the rulebook, and the board is marked. The changes are irreversible by
Through a bidding auction that sets a contract, followed by play to fulfil it — and the scoring rewards bidding accurately far more than taking extra tricks, which is what makes the auction the heart
Because the techniques that solved chess do not scale to Go, and the position is far harder to evaluate — so Go required a genuinely different approach rather than more computing power. The branching
By combining a search through possible future moves with an evaluation of the resulting positions — and the way that evaluation is produced changed fundamentally in recent years. The classical
It varies enormously, and the useful way to think about it is not as a single ratio but as how many decisions and how many trials a game contains — because luck averages out and skill accumulates.
A mechanic in which acquiring cards during play is itself the main decision — you start with a weak, identical deck and construct a better one as the game progresses, and your deck's improving
What the players are doing — competing within fixed rules, simulating a conflict, or collaboratively telling a story — and each carries different expectations about winning, length and preparation.
A runner engaged to set a predetermined pace for part of a race and then drop out — and they are permitted because they are competing under the same rules as everyone else, however obviously they are
The finding that children born early in a selection year are substantially over-represented in elite sport — a bias that begins in childhood and persists all the way to professional level. The