Premise:
"Why shouldn't it be?""
Hypothesis: Why was it not?

no

Premise:
"Mightn't be able to prove it to a pack of lawyers. "
Hypothesis: There is not enough evidence to convince a group of lawyers.

it is not possible to tell

Premise:
"The Merchant said, peevishly, "Why do you keep silence?""
Hypothesis: The Merchant was happy to be the only person talking.
no