Premise:
"It also fit with his history of taking on new challenges."
Hypothesis: He had never taken on a new challenge before.

no

Premise:
"It could also swell the underground economy, as people use it to pay for services, facilitating the avoidance of federal income tax."
Hypothesis: It could be a boon to the underground economy, causing people to flock to it and shrug off their tax liabilities and burdens by the score.

it is not possible to tell

Premise:
"now you could kill somebody with them and the one you buy go out and buy one now and they're just so thin and flimsy and"
Hypothesis: The thing that you buy is rigid and harmless.
no