Premise:
"EPA continued to involve stakeholders in the National Environmental Goals Project by soliciting comments on the summary report."
Hypothesis: EPA was surprised by how insightful the comments made by stakeholders were

it is not possible to tell

Premise:
"It's amazing to me how people can slip in and out of frivolous talk (though I know it serves a socially useful purpose) with seeming ease."
Hypothesis: It fascinates me how easily people can talk about unimportant subjects.

yes

Premise:
"Really, I only needed a quick peek."
Hypothesis: I didn't need to see the magazine cover for long.
it is not possible to tell