Premise:
"Others insist that it was just a storehouse for jewels."
Hypothesis: It is not used as a storehouse for the jewels.

no

Premise:
"No amount of chat will ever restore their virility."
Hypothesis: Their virility will not come back through chat.

yes

Premise:
"The same questions were asked yesterday."
Hypothesis: Those questions are new and have never been asked before.
no