Sentence 1: While the Postal Service collects extensive data on the cost behavior of city delivery carriers, it collects little data on the cost behavior of rural carriers12 For purposes of this analysis, we assume throughout that rural delivery cost behavior is similar to that of city delivery.

Sentence 2: Without complete data, assumptions were made about rural delivery cost.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: he has one called The Ninja

Sentence 2: He possesses The Ninja.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: The roofs of all the buildings were flat, with loopholed parapets to be manned at need.

Sentence 2: Every building had a steeply-angled roof.
Is this second sentence entailed by the first?

Answer:
no