Sentence 1: The total cost for other countries can be estimated by substituting volume and population into the above formula.

Sentence 2: You cannot plug in the volume to the formula.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: It would be hard to spot one among three million, anyhow.

Sentence 2: One can mingle easily with the rest of them.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: well you know what they say about the weather here in Texas

Sentence 2: You've heard what people say about weather in Ohio.
Is this second sentence entailed by the first?

Answer:
no