[legion]

The Gateway Drug Theory is based on a stastical fallacy.

It is true that among hard drug users, most started out using pot.

However, it is not true that among pot users, most move on to hard drugs

There are two groups:

A: Hard drug users
B: Pot users

Given A, most belong to B.

However, given B, very few belong to A.

The whole "Gatway" theory alleges that given B, most will become A, given enought time. This is false.