Premise:
"No, admitted Tuppence, "I haven't but I know some one who has.""
Hypothesis: Tuppence does not know anyone.

no

Premise:
"Its wealth of trees is remarkable, including the tualang, found both in the northern half of the peninsula and in Sabah and Sarawak."
Hypothesis: The tualang is not found in the north of the peninsula.

no

Premise:
"and she was talking gibberish."
Hypothesis: She was talking nonsense.
yes