Sentence 1: Such coordination will require better communication within and among the agencies.

Sentence 2: The project was nixed because the agencies refused to work together.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Sam was still grinning, but there was a curve of lip which was far from any real humor, even that provoked by the practical jokes of a barracks bully.

Sentence 2: Sam had been grinning for about 10 minutes.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: Rather, it can simply mean rediscovering the common ground that liberals have long shared with the middle class without even realizing it.

Sentence 2: The middle class used to have a great deal in common with liberals.
Is this second sentence entailed by the first?

Answer:
yes