[bcoffey]

It's not just a good idea, it's the Law.

About a hundred years ago, the Tennessee State Legislature attempted to pass a law fixing the value of PI at 3. (Using 3.14159265.... was too hard on the children).

From Petr Beckmann's "The History of Pi"

[FreedomFarmer]

If a pie pan is 9" across, and you remove a piece of pie 3" across at it's widest, how many pieces of pie are left?

[Erasmus]

One of my favorites.