Why do birds float? Petition to exterminate floating birds.

[Lerris]

And by the way, this is a serious thread. I know you guys like to make superficial judgments about my threads, but please bear with me on this one.

If an email says "This is not a scam", it's almost certainly scam.
If a chain letter says "This is not a chain letter", it's still a chain letter.

What should we believe?