Premise: And it came to me sudden like that there might be a green dress amongst them.

Hypothesis: I believed that it was not possible that there was a green dress there.
Answer: no

Premise: After centuries of peace and productivity, the year a.d. 426 marked the beginning of an era of strife, violence, and destruction.

Hypothesis: Before a.d. 426 there was nothing but violence.
Answer: no

Premise: I am merely a man, no more valuable than any other.

Hypothesis: I don't want people to think I'm special.
Answer: it is not possible to tell

Premise: But, Poirot " I protested.

Hypothesis: The narrator agrees with Poirot.
Answer: no