From a reader:

Jonah,
I’d like to point out the implications of Howard Dean’s recent remarks.
1. According to Dean, only perfect people have a right to give moral lectures. (“It is galling to be lectured to about moral values by folks who have their own problems.”)
2. Dean lectures us morally. (“This is a struggle between good and evil, and we are the good.”)
3. The inescapable conclusion, therefore, is that Dean is perfect.
Republicans have often been criticized for their belief in Jesus, but at least so far they’ve stopped short of making Him their party’s chairman.

Update: Another reader dissents:

If you are perfect, then you may lecture on morality.
Dean is lecturing us morally.
It does NOT logically follow that Dean is perfect or that he is saying he
is.
A causes B
B
does NOT therefore mean A.
Something ELSE might be causing B.
These would be a better fit.
If you are a blow hard DNC chair, then you may lecture morally.
Dean is a blow hard DNC chair.
Therefore, he may lecture morally.
If you are morally lecturing, then you must be perfect.
Dean is lecturing us morally.
Therefore, Dean must be perfect.