It really annoys me ...

[potioncat]

No: HPFGUIDX 163795

Inge wrote: 
> Anyone else who's annoyed by something "not logic"? Im sure there 
must 
> be :-)


Potioncat:
Well, canon tells us that wizards are not logical 

OR


JKR didn't think of it


OR

Something happened to Black's wand

OR

There are ways to trick the priori incantatum.

JKR has said that there are ways to get around Veritaserum. Black is 
very bitter when he talks about being sent to Azkaban without a trial 
(GoF) So perhaps in the rush to send him off, his wand was damaged or 
otherwise made inoperative. 

It just seems to me that there was something about Black that so few 
questioned the betrayal...or there was something about the WW itself.