Premise:
"'Never underestimate your adversary.' "
Hypothesis: Always underestimate your adversary.

no

Premise:
"But there is nothing benign in this question; it is an echo of To be, or not to be?"
Hypothesis: The serious question remains, as an echo of the famous Shakespearean quote: to be, or not to be.

yes

Premise:
"Somewhere out there in the dark the Pima Scout was prowling."
Hypothesis: Pima Scouts prowl in the dark because they hate the sun.
it is not possible to tell