Sentence 1: This one-way connection will offer speeds up to 150,000 bits per second.

Sentence 2: This two-way connection will allow speeds up to 150,000 bits per second.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: When you wanted to shop, you went to the mall and confined your search to the stores you found there.

Sentence 2: It took you hours to look at all the stores, so you stayed until the mall closed.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: Commercial traffic declined during the 17th and 18th centuries, revived briefly with the advent of the steamship in 1832, then succumbed to silting and the onslaught of the railways.

Sentence 2: Commercial traffic died out due to cost inefficiencies.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell