A corollary to Godwin's Law, the rule that says an argument is forfeited if a participant compares his opponent to Hitler, Hodwin's Law states that when discussing progressive policies such as increasing the tax rate on the wealthy, the first person to cry 'Communist!" and/or 'Stalinist!' also loses.
'Well, all we need to do to rein in the deficit is raise the tax rate on the top 10% of wage earners.'
What? That's wealth redistribution! You Communist! You tool of Satan!
Ha! You just lost! You broke Hodwin's Law!