Premise:
"In other words, it's possible (though probably unlikely) that Clinton is in psychotherapy under the guise of seeking ministry from a psychotherapist who's also an ordained minister."
Hypothesis: Clinton is seeking psychotherapy on the sly from an ordained minister.

it is not possible to tell

Premise:
"It is a clinical document, an anthology of unexamined prejudices, a tiresome Manhattan whine."
Hypothesis: The document was very detailed and extremely objective.

no

Premise:
"I wonder if he'd heard Tomas Borge's radio interview."
Hypothesis: Tomas Borge is a very successful radio show host.
it is not possible to tell