Sentence 1: It is simply that they don't have to do any of that.

Sentence 2: They have to do all of that?!
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Less spectacular than its expensively restored neighbor to the south, Toshodaiji nevertheless is the largest remaining example of Nara period architecture.

Sentence 2: The restoration of the south neighbor made Toshodaiji less spectacular.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: El Morro was not, however, invulnerable.

Sentence 2: El Morro was vulnerable.
Is this second sentence entailed by the first?

Answer:
yes