Lupin, the Moon and the Bewitching Hour

[blenberry]

No: HPFGUIDX 32806

>In re the boggart, I would also say that the Rule of
>Similarity is in effect. The boggart *portrays* the
>Moon, but it doesn't have the *effect* of the Moon. 
>After all, in the other scenes with that particular
>creature, the fear is due to the subject accepting the
>illusion as the reality. Lupin cannot accept that, as
>the effect must bring on transmogrification if the
>effect is real.

In this case, how do you explain the boggart-dementor's effects on 
Harry?  He *knows* it's a boggart.

sorry if this has been addressed elsewhere... I'm new :)