Sentence 1: But this is to desert, even betray, his subject.

Sentence 2: Something is going to reinforce his subject.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Orthodox Judaism, likewise devoted to the suppression of women's hair, has long since solved the problem another way, with fashionable wigs.

Sentence 2: Orthodox Judaism has introduced fashionable wigs to Jewish women.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: The road leaves the valley floor and takes you past the small villages of Elterwater and Chapel Stile before offering the first real views of the Langdale Fells.

Sentence 2: One can see Langdale Fells after going past Elterwater.
Is this second sentence entailed by the first?

Answer:
yes