Guys, I think you all should lay off a bit on breath. This board should allow different voices and opinions.
His point is a bit similar to hdg point: legal obvious is not equal to scientific proving. Seems unfair? Yes, I agree. But this is where sec. con. come to play.
If Singer wants to argue prima facie is nonobvious, then I am a little lost, because PTO ruled prima to be obvious twice, but approved Marine based on sec. con.