The 'Dolphins Are Fish' Arguement
Ok this argument originated a few years ago in a conversation (drunken) with my cousin. My cousin is highly intelligent so I wanted to mess about with him while he was drunk then throw it back at him when he was sober.

Here's what you do:

Out of no where comment that dolphins are the most annoying fish. Now what should happen is the person you are picking the fight with should say 'dolphins are mammals, not fish.You continue to argue that they are fish, then appear to be giving up by saying 'A mammal? ... Like a dog?' The prson will probably think for a minute but should eventually agree with you.

Turn to them and say 'hmmmm, I still think it's a fish'. The other person should continue to tell you dolphins are mammals. When you think they've had enough turn to them and say 'It's obviously a fucking fish!' (appear aggitated at your opponent's stupidity!) Chances are they will ask 'why's it obviously a fish?' Turn to them and ask 'what does it look more like? A dog or a fish?'.

If this method still works you will see a confused and defeated look on your opponents face! Brilliant!
Todays From The Brain Of Tiny