Ground Truth

Reviewing work with an explicit mandate to refute it, from a perspective that did not produce it.

Turning audio into text, and the reasons real-world accuracy is set by the signal more than by the model.

Over-trusting an automated recommendation, including against available contrary evidence.

An expansion invented after the fact to fit letters that already existed as a word or acronym.

judging a specific case from vivid evidence while discounting how common the categories actually are.

any headline phrased as a question can safely be answered "no".

A coarse language for how an algorithm's cost grows as its input grows.

Living bone is continuously resorbed and rebuilt, which is why fractures heal and why healing runs in stages.

The hypothesis that visible disorder invites serious crime, and the long dispute over whether the evidence supports it.

The tool that resolves an application's modules into the files a browser downloads.

Imitating the visible form of a practice while the mechanism that made it work is absent.

The mapping between characters and bytes, and the source of a specific family of invisible bugs.

The convention that a conspicuously introduced story element must pay off later.

Cryptographically attesting who produced a binary, and the operating-system checks built on it.

Dividing an application bundle so a page downloads only the code it needs.

Words that habitually appear together more often than chance predicts, independent of any grammatical rule.

Fraud that obtains trust first, so the victim hands over the money themselves.

The tendency to search for, interpret, and recall evidence in ways that favor what you already believe.

Packaging an application with its dependencies into an isolated, reproducible runtime unit.

Automatically releasing every change that passes validation.

A long-running background process managed by the operating system's service supervisor.

Extracting a game's files to recover mechanics, content and numbers the developer never published.

Refractive index varies with wavelength, so a medium bends colors by different amounts.

A substitution that reanalyzes a phrase into a different but still-plausible meaning.

Narrative carried by placed objects and world state rather than dialogue, completed by the audience's inference.

A statement of the form "the last one" or "nothing else does this" — load-bearing, and only as good as the search behind it.

The convention that a detective story must give the audience every clue it needs to solve the case.

A claim is only worth something if you know what observation would refute it.

Splitting work across parallel workers and recombining their results.

Reaching a defensible order-of-magnitude answer by decomposing a question into estimable factors.

A test that passes and fails on identical input, and the most corrosive thing a suite can contain.

Words reshaped to resemble familiar parts, and the false origin stories that reshaping invites.

Holding fractured bone still enough, and aligned well enough, for biology to do the repair.

A fracture that stops progressing toward healing, usually because of motion, gap or lost blood supply.

Wildcard pattern matching over filenames, similar enough to regular expressions to mislead.

A noun classification system that forces agreement across a sentence and correlates only loosely with meaning.

Fluent, confident output that is not grounded in anything real.

Never attribute to malice that which is adequately explained by stupidity.

A claim feels more true the more times you've heard it, independent of any evidence for it.

A coordinate system in which an undisturbed body moves at constant velocity, and none is privileged.

Adding measurement to code so its execution can be observed, and the distortions that introduces.

Juxtaposed shots produce a meaning that exists in neither shot alone.

A fixed-capacity cache that evicts whichever entry has gone untouched the longest.

Making a system countable and administrable, at the cost of the local knowledge that made it work.

Folding, slitting and sealing a letter so the sheet becomes its own tamper-evident envelope.

An object that motivates a plot while remaining substantively irrelevant to it.

Overlapping changes that a merge cannot combine automatically, requiring a decision.

A subgenre where progress is gated by what the player has learned, not by an item or ability the character carries.

A macroeconomic account holding that a currency issuer is constrained by real resources and inflation rather than by revenue.

The directed graph of imports that decides what code ends up where.

Wounds kept moist under an occlusive dressing re-epithelialize faster than wounds allowed to dry and scab.

A misheard phrase reanalyzed into something else that still makes sense, most often from song lyrics.

A conditional-probability puzzle in which switching wins twice as often as staying.

The nervous system's detection of damaging stimuli, which is not the same thing as the experience of pain.

How much of a system's internal state can be inferred from what it emits.

Color is recoded after the cones into red-green, blue-yellow and light-dark opponent channels.

Pressure applied to a confined fluid is transmitted undiminished throughout it.

The unit of an absolute change in a percentage, and the gap between that and a relative change.

designing or marketing a product for a shorter useful life than it could otherwise have.

A causal explanation that was inferred rather than tested, and reads as more rigorous for being specific.

Light whose electric field oscillates in a preferred orientation, and the filters that select for it.

The two measures of how well a classifier or search finds what it should, how often its hits are right and how many of the real cases it catches, and why improving one usually costs the other.

Spending effort making code fast before you know where it's actually slow trades clarity for speed you may not need.

A kernel metric for how much time work spent waiting on CPU, memory, or I/O, which measures contention directly where utilization figures only hint at it.

Divergent interests and unequal information between whoever delegates and whoever acts.

Categories are organized as graded resemblance to a best example rather than defined by necessary and sufficient conditions.

A defect whose occurrence depends on the relative timing of concurrent operations.

Regulators coming to serve the industries they oversee, and why the word is often overused.

Spending resources to capture existing value instead of creating new value.

The smallest set of steps that reliably produces a fault, and the unit of real debugging.

the movement for consumer and independent-shop access to the parts, tools, and information needed to fix a device.

The energy a rolling tire loses to deformation, and why more pressure stops helping.

Escalating past the visible symptom until you find the layer that actually produced it.

Explaining a problem aloud, in full detail, to a listener who cannot help — and finding the fault while explaining it.

Storing, distributing, and rotating credentials without embedding them in code or history.

The claim that pre-industrial night sleep came in two blocks separated by a waking interval, and the dispute over how general that was.

A sample distorted because inclusion in it was never random.

A word repeated aloud until it briefly stops registering as meaningful.

The two error rates of a test, and why neither answers the question a person actually asks.

The interactive command interpreter, and a programming language with unusually sharp edges.

A pronunciation or usage that reveals group membership, historically used as a test with lethal stakes.

A failure that produces no signal, so the absence of an error reads as success.

The rate at which tissue absorbs radiofrequency energy, measured in watts per kilogram.

Completing a game as fast as possible under a ruleset the community defines, not the game.

The informal norms communities use to manage narrative disclosure around games still being played.

Looking where the light is good rather than where the answer is.

A model instance spawned by another to handle a scoped task with its own context.

Drawing conclusions from a sample already filtered by success.

Rendering fewer pixels per frame and reconstructing a full-resolution image by accumulating samples across frames.

The experimental claim that reminders of death increase defense of one's worldview and self-esteem.

Whatever decides whether a test's output is correct, and the often-overlooked hard part of testing when nobody knows the right answer in advance.

Civil time is a political layer over solar time, and its rules change often enough to be data.

Hardin's parable of shared-resource collapse, and Ostrom's evidence that it is not inevitable.

Reading a truncated result as if it were the whole result, so every counterexample is invisible.

A statement that holds only because its subject set is empty — a green result that measured nothing.

A closed loop that moves heat by boiling and condensing a working fluid at two pressures.

Tissue fed by a single terminal or retrograde vessel has no redundancy, so injury there heals badly.

How custom typefaces are fetched and shown, and why the cost is easy to misattribute.