Sentence 1: Likewise with Most of the 22 million Americans who've tried it have had no trouble walking away from it.

Sentence 2: Millions of Americans have no trouble walking away.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: It would provide power generators with more certainty about their regulatory future and thus allow them to make wiser decisions about investments in new technology, which would improve energy security.

Sentence 2: They want to put miniature nuclear fission in the generators, but aren't sure if it will be allowed.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: But there's no doubt he can throw light on one or two obscure points in young Beresford's letter.

Sentence 2: Beresford is dead and so he can't explain this himself.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell