Quote:
Originally posted by librasoul22
The fallacious logic that is used to show that marijuana is a gateway drug is something similar to this:
Assuming that all heroin users began by using marijuana:
Bob uses heroin.
Bob has used marijuana. <---- This statement is TRUE.
All heroin users began by using marijuana.
Bob has used marijuana.
Bob uses heroin. <---- If you follow the logic of the first statement, while not necessarily false, THIS is not necessarily TRUE. Perhaps he is still simply using marijuana.
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you are correct. if i remember my math right (which i do
) :
T ---> T = T
F---> F = T
F ---> T = T
T ---> F = F
you can't flip those statements, it is purely mathematical. it won't work for any analogy, about drugs or flowers.
so that analogy doesn't work. i see where you were trying to go, but you can't use that logic in a mathematical sense.