Premise:
"probably some of them did"
Hypothesis: Some of them likely did.

yes

Premise:
"The river plays a central role in all visits to Paris."
Hypothesis: The river is central to all vacations to Paris.

yes

Premise:
"We'll ask Miss Jane Finn to tell us the story that only Miss Tuppence has heard so far but before we do so we'll drink her health."
Hypothesis: Jane Finn will not tell us the story.
no