Tiebreaker 4: Optimise for who is actually there
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Spec: descriptive guidance, not a checkable rule.
It carries no forbidden and instead pair, and no `jig check` detector applies to it directly.
Section: Principles
Group: Tiebreakers

**When density and legibility conflict, decide by the user's real conditions, not by preference.**

A first-time visitor on mobile data in bright sun and an operator at a large display for eight hours need opposite things. Mode encodes this. When the mode is genuinely unclear, ask — do not average, because the average serves neither.