Premise: He began turning the crank, just as the Sather came up.

Hypothesis: Sather came up just as he started to crank.
Answer: it is not possible to tell

Premise: Suppose, suggested Poirot, "that, unknown to you, she had made a new will in favour of some one who was not, in any sense of the word, a member of the family, we will say Miss Howard, for instance, would you be surprised?"

Hypothesis: Would you be surprised if she made a new will that favored an outsider?
Answer: yes

Premise: Plans to house parliament here after Independence came to nothing; Leinster House (in Kildare Street) was chosen instead.

Hypothesis: Leinster House is a larger building, which suits parliament better.
Answer: it is not possible to tell

Premise: You can do what some corporations do.

Hypothesis: You can't do what any business does.
Answer: no