🚨 unknown is the most common state in this product, so it gets a real token rather than an empty cell. A dashed 1px edge with a transparent fill reads as left open where a solid edge reads as filled in. stale carries a date in DM Mono because "checked 12 days ago" is a different claim from "unknown" — the date is the content. Never red, in any of the three, and §2.4 does not loosen this: a missing fact is neither a date nor a danger, a red unknown reads as you did something wrong when the thing missing is ours, and "we don't have hours" must stay visually distinct from "closed". blocking is the one that may take the flag red, because a blocking conflict is by definition time-bound. §2.3, §6.2.