Which exposes one of the problems with Popperianism..it leads to the burden of proof being shifted to the wrong place. The burden should be with who proposes a claim, or whoever makes the most extraordinary claim. Popperianism turns it into a burden of disproof on the refuter. All you have to do is "get in first" with your conjecture, and you can sit back and relax. "Why, you have to show Barack Obama is NOT an alien".