Forum:Possible Plot Hole?

I just saw a question on Wikianswers that caught my attention. The question was If Quirrel knew Snape never wanted to kill Harry, then how come Voldemort believed in Snape? Is this a possible plot hole, or is the unknown questioner and I missing a crucial detial? Just curious. Q u i d d i t c h L o v e r (My talk) <font face="Script MT Bold" size=3 color=gold>(cont <font face="Script MT Bold" size=3 color=green>ribs) |undefined 06:05, October 13, 2009 (UTC)