Theory: optimal blind defense?

[Buckshot]

It's funny b/c blind defense is so stupid sometimes. There are some really good blind defenders and then there are some really retarded defenders that think they're good because they cracked aces on the button. BUT...If I were to defend the blinds with optimal frequency I would choose hands that have a mathematical advantage vis-a-vis the range of hands my opponent could have. And this only works if I have reliable knowledge against who I'm defending the blinds.

~stephen