Premise:
"You'll see fishermen working their dipping-nets or flinging hand-nets out with a whirling motion."
Hypothesis: The fishermen use five kinds of nets.

it is not possible to tell

Premise:
"Gray attributes Fagles' popularity to his simple, straightforward language."
Hypothesis: Fagle's language is mired with long, technical jargon that can only be understood by someone with a college degree.

no

Premise:
"Second, it's hard to maintain a consumer boycott, especially when the goal is to punish the past rather than to influence the future."
Hypothesis: The goal of punishing the past, rather than change the future can hinder boycotts.
yes