Sentence 1: The best time to see them is in the weeks following the rice harvest and during the special festivals that stage statewide contests .

Sentence 2: It's impossible to see them in the weeks following the rice harvest.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: He united the Western coalition, and he led Gorbachev over the precipice.

Sentence 2: He could not unite the Western coalition and had no effect on Gorbachev.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: 'If you'll just...'

Sentence 2: If you could come over here.
Is this second sentence entailed by the first?

Answer:
yes