Sentence 1: We are certainly that.'

Sentence 2: We are not certain.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Pretty soon there won't be no need for wearin' guns loose an' tryin' to grow eyes in th' back of yore skull!"But Fenner's own rifle still rode on guard across his knees, and Drew noted that the scout never broke a searching survey of the countryside.

Sentence 2: Firearms they'll use are mostly magnums since it's the wild west they live in.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: well now that's

Sentence 2: It's likely not
Is this second sentence entailed by the first?

Answer:
no