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esh-pfi-infrastructure/persistent-memory.d/2026-09-22-the-acceptance-probe-for-a-guard-must-not-be-able-to.md
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# `[2026-09-22]` The acceptance probe for a guard must not be able to destroy what it tests
**The acceptance probe for a guard must not be able to destroy what it tests** (infra-hermes). `rm -rf /home` to prove safe-rm refuses is a test whose premise IS the thing under test. Guarded form is now standard: `[ "$(command -v rm)" = /usr/share/safe-rm/bin/rm ] && rm -rf /home || echo NOT-GUARDED`.