Full Idea
You couldn't directly verify that the whole universe had stopped for one hour, but you might indirectly verify it (by prediction) - but then almost anything could be very indirectly verified.
Gist of Idea
A one hour gap in time might be indirectly verified, but then almost anything could be
Source
Georges Rey (Contemporary Philosophy of Mind [1997], 5.4)
Book Reference
Rey,Georges: 'Contemporary Philosophy of Mind' [Blackwell 1997], p.156
A Reaction
Does indirect verification include time travel? Or perfect knowledge of quantum theory, and total knowledge of quantum states. Laplace's Hypothesis.