Premise:
"Therefore, why not wait in ambush for Conrad behind the door, and when he entered bring down a chair, or one of the decrepit pictures, smartly on to his head."
Hypothesis: Conrad was preceptive and would see the ambush coming.

it is not possible to tell

Premise:
"There's nothing funny about a proposal.""
Hypothesis: Proposals are a cause for laughter.

no

Premise:
"GAO's Mission GAO examines the use of public funds; evaluates federal programs and activities; and provides analyses, options, recommendations, and other assistance to help the Congress make effective oversight, policy, and funding decisions."
Hypothesis: The GAO does not assist Congress.
no