Show me a video of UBL talking about Nutjob's UN visit while standing up on his own power in front of a TV showing Al Jazeera's coverage of the address and holding up todays NYT, and I will take it all back. Scratchy audio of some Al-Qaeda foot soldier wont convince me. He's dead, Jim..
A null hypothesis is assumed to be true (he's alive) until there is overwhelming evidence for the alternative hypothesis (he's dead).
If our generals thought the way you do, they'd all be relieved of command.