Sentence 1: Fell running also tests the mettle.

Sentence 2: Fell running requires no courage.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Since then, the Jewish Quarter has been rebuilt.

Sentence 2: The Jewish Quarter remains cracked and broken.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: I must've...I don't know what I must've done.

Sentence 2: I'm not sure what I did.
Is this second sentence entailed by the first?

Answer:
yes