Sentence 1: John looked puzzled, not quite understanding the portent of this cryptic saying.

Sentence 2: John understood the saying.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: The various combinations will be discussed further in Section 4.2.

Sentence 2: There is only one way that these factors can be combined.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: His eyes blurred with tears and he tasted iron in the back of his throat.

Sentence 2: He was crying.
Is this second sentence entailed by the first?

Answer:
yes