`dc3f158bc` corrected a false universal ("this arm's errors are refusals, never
acceptances") and, in the same sentence, appended a second unmeasured
fail-direction claim: "and the `split(\"\\n\")` residual below is the second
acceptance of the same kind". That clause inverts the paragraph it points at.
MEASURED, by loading the module and calling its own primitives with
`CANONICAL_SINK_ASSIGNMENT + \x0c + "rm -rf /tmp/nothing"` on one physical line
followed by `CANONICAL_SINK_SOURCE`:
instrumentation_faults(...) -> "the sink preamble is not
the canonical two lines"
splitlines() selection == [CANON, SOURCE] -> True (ACCEPTS)
split("\n") selection == [CANON, SOURCE] -> False (REFUSES)
The shipped `split("\n")` refuses exactly where the rejected `splitlines()`
accepts, which is what the pre-existing paragraph six lines below already says.
There is no second acceptance below; the acceptance belongs to the alternative
that was NOT shipped. `\x0c` is not a line terminator for bash either, so
`split("\n")` matches the shell the checker models and has no hole of this kind.
The FIRST half of the sentence stands and was re-measured: a hook carrying the
two canonical lines plus `v="ETV_HOOK_FIRE""_LIB=/tmp/evil.sh"; eval "$v"`
produces no preamble fault, so the selector really does accept a writer that
never spells the literal. Answered by SUBTRACTION per the brief: the sentence
ends at "not all refusals." and no replacement prose is written.
`dc3f158bc`'s message argues from the same inversion ("the comment already
conceded an acceptance hole of the same kind six lines later"); that half of its
reasoning is withdrawn here. Its correction of the universal is unaffected — the
selector escape it names is structural and independently measured, above.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015QqCpYFsKgnAnx6jVwrKiV
timothyandClaude Fable 5.1
81358dec5a