Question: Nearly all heroin addicts have used marijuana sometime in their
Nearly all heroin addicts have used marijuana sometime in their lives. So, some argue that marijuana should be illegal because marijuana users are likely to become heroin addicts. Use a Venn diagram to illustrate the fallacy of this argument, by sketching sets for M = marijuana use and H = heroin use such that P (M | H) is close to 1 but P (H | M) is close to 0.
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