Posit (v): to suggest something as a basic fact or principle from which a further idea is formed or developed.
You were .... suggesting something ("could change because") as a basic fact ("relatively increased use in the lower 48") from which a further idea is formed or developed (that would be weak evidence that legalization for Alaskan adults did impact teen use).
In 1988, a survey indicated the Alaskan teen rate was double that of the lower 48. Today, after Alaska recriminalized, the teen rate is about the same.
The only way that does NOT mean that legalization for Alaskan adults had an impact on teen use is if teen use in the lower 48 DOUBLED from 1988 to the present to equal that of Alaska.
Now, if you are not saying that, then shut up. My statement stands.
Wrong; I suggested it as a possible alternative, not a fact ("basic" or otherwise).
In 1988, a survey indicated the Alaskan teen rate was double that of the lower 48. Today, after Alaska recriminalized, the teen rate is about the same.
The only way that does NOT mean that legalization for Alaskan adults had an impact on teen use is if teen use in the lower 48 DOUBLED from 1988 to the present to equal that of Alaska.
That follows only if Alaskan teen use remained steady. (Then there are the methodological problems that TKDietz has so ably explained.)