Typical creationist, ask him to back up a silly claim and you get nothing but dodging.
For some reason I'm reminded of the scene in Monty Python's Holy Grail where they use "logic" to determine if someone is a witch.
BEDEVERE: Exactly. So, logically...
VILLAGER #1: If... she... weighs... the same as a duck,...she's made of wood.
BEDEVERE: And therefore?
VILLAGER #2: A witch!
http://www.youtube.com/watch?v=TcBXuFxMYd0