Premise:
"Industrious BW-armed terrorists could more or less do Manhattan in the same time."
Hypothesis: Manhattan could be done in by BW-armed terrorists much like they did Munich.

it is not possible to tell

Premise:
"119 Cynthia was back from the hospital, and I placed my chair beside her, and told her of Poirot's wish to visit the dispensary. "
Hypothesis: He was still connecting all the dots of his investigation and this was one more step.

it is not possible to tell

Premise:
"The auditors' understanding may come from knowledge they already have about the program or knowledge they gain from inquiries and observations they make in planning the audit."
Hypothesis: The auditors' understanding might come from the knowledge that they have about the program from the reading they did.
it is not possible to tell