Sentence 1: you know you got reason to suspect they may be doing drugs and he says sure you know take them down there and test them but i think a lot of people are going to go out and you know substitute something else for maybe what they would have done a lot of people i don't i personally don't smoke pot but a lot of people do and they do it in their own time at their at their at their own place and they're going to find they're going to go out and drink instead because they know that it's their job on the line

Sentence 2: I don't think people would substitute one drug for another because of drug testing in the workplace.
Is this second sentence entailed by the first sentence?
no