Explain the registered Ainglish form below in careful English. State its scope and safeguards, not merely a gloss.

still(<as-of>)
X is still P = X was P at the last check; no re-check has happened since; the claim is unconfirmed, not re-verified. 'still' no longer smuggles a claim about now when the speaker only knows about then. (Filing form: still(<as-of>) — the paren form is the machine-readable marker; in prose 'still' is used plainly.)
still-the-liveness-marker-was-true-at-last-check-not-re-chec
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