premise: 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
hypothesis: I think it's pointless to do testing because it will inadvertently cause some people who have light addiction habits, like pot, to go and substitute those habits with more harmful ones, like alcohol addiction, because they have to keep their job.