Four decisions: Door C projects and never derives (D-C1), the projection is
key-agnostic so it is not about numbering (D-C2), an unrenderable value drops
the facet and never the concept (D-C3), and a faceted entry is refreshed
because it is the first entry that can go stale (D-C4).
Also records a measurement about the measuring. The mutation harness first
reported 11 of 11 killed; the number was entirely false, because it invoked
pytest with an unrecognised `--timeout` flag and every run exited non-zero. The
negative control caught it by being reported killed when it provably could not
be. Honest result is 9 of 11, with both survivors analysed as equivalent
mutants and the one real gap they exposed (profile threading pinned only by
coincidence) closed with a direct test.
Closes open item 6 of the Door B record, which asked exactly the question this
answers: whose claim does the frontmatter make.
Kjell Tore Guttormsen
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