Premise:
"How did you know? I whispered. "
Hypothesis: I whispered to the person.

yes

Premise:
"Prepared Office of Air Quality Planning and Standards, Office of Air and Radiation, April."
Hypothesis: It was prepared by the US military.

no

Premise:
"At his government-required anti-terrorist training session recently, a captain for a major airline said,"
Hypothesis: At the meeting that showed him how to identify terrorists.
it is not possible to tell