Sentence 1: Sergeant, just what is going on here?"Whoever, having once heard that turkey cock crow, could ever forget it, thought Drew.

Sentence 2: Drew could never forget the sound of a turkey cock crowing because it was loud and obnoxious.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: Dave felt his stomach tighten and braced himself.

Sentence 2: Dave braced himself because he was on a roller coaster.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: What you see is only the top third of the original it broke during shipment.

Sentence 2: The bottom third was reconstructed on arrival.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell