Sentence 1: Well, why not?

Sentence 2: Say why not?
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: To reach Gretna Green, take the M6 north from Penrith.

Sentence 2: The only way to reach Gretna Green is by taking M6
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: The executives receive a rating on how well they achieved their responsibilities during the year and the actions taken to support the accomplishment of the strategic goals and annual business plan.

Sentence 2: The executives get a rating for how well they perform.
Is this second sentence entailed by the first?

Answer:
yes