Related:

• How do you determine the sex of a computer?
• If a person never succeeds, how do you know they're trying?
• If you have never failed, you probably will not succeed, because even if you do, you won't know it.
• Homer: I'm just a big fool. Karl: Oh no, you're not!
  Homer: How do you know? Karl: Because my mother taught me never to kiss a fool!...
• You never know what you can do without until you try. -- Franklin Adam
• How come you never see a politician laugh? Because they know what they're getting away with, and if they started laughing, they'd never stop.
• In science it often happens that scientists say, 'You know that's a really good argume
  my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again....
• In science it often happens that scientists say, 'You know that's a really good argume
  my position is mistaken,' and then they actually change their minds and you never hear that old view from them again....
• To what position do you want to be teleported?