Snape's Patronus

[johnbowman19]

No: HPFGUIDX 90845

Snape has to have a happy memory. But I think the problem people 
have with this post is the definition of a happy memory. What makes 
people happy is different from person to person. Say for instance a 
death eater could have a happy memory of killing someone or 
torturing someone. That would be a happy memory. Plus Snape had a 
home life that was maybe worse then Harry's, and since Harry used 
the idea of leaving his aunt and uncle, wouldn't Snape be able to 
produce a Patronus too?
Thanks
John