TermCraft conventionFoundational

Heuristic

A rule that is usually right, used to spot problems quickly.

Definition

A rule of thumb used to evaluate or guide design, based on expert experience rather than on measurement of a specific case.

Craft convention. True because the industry converged on it. Breaking it costs familiarity, not correctness.

In plain language

A rule that is usually right, used to spot problems quickly.

Nielsen's ten usability heuristics, used as review criteria in an expert evaluation.

Each link says what the connection is, so you can tell a principle from an alternative from a thing people mix this up with.

The full entry behind this definition.

Connected closely enough to change how you apply this.

Adjacent territory, found through shared tags rather than a stated link.