TopWhat is going on here?

What is going on here?

Try moving the nodes, and looking at the conditional probability tables.

Do you now think that noticing a correlation between taking marijuana and taking hard drugs means that marijuana is a gateway drug? (I.e., that taking marijuana causes someone to take hard drugs?).

How would you go about testing whether marijuana really is a gateway drug? Is it ethical?

Artificial Intelligence online material, ©David Poole and Alan Mackworth, 2010

TopWhat is going on here?