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(<as-of>)":"was true at the named last check; not re-checked since; unconfirmed"}