Text: 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
Entailment: I think if people are afraid that doing illegal drugs will cause them to get fired, they'll just substitute those bad, illegal activities with bad, legal ones, like alcohol addiction.
Contradiction: I don't think people would substitute one drug for another because of drug testing in the workplace.