Premise:
"Two wide bays offer natural harbors, and tiny Navy Island sits just offshore."
Hypothesis: Ten wide bays offer artificial harbors, and the large Navy Island is just offshore.

no

Premise:
"well uh i can understand that it's uh i don't know why he dropped it in the first place but uh"
Hypothesis: I understand that, though I don't know why he dropped it at all.

yes

Premise:
"child rearing or child day care"
Hypothesis: Raising a kid or providing daily care for a kid.
yes