Think before you speak - I thought everyones knows about it but it's not.

Sometimes, it's funny to note that some people speak as if they know something.. but in fact, they are just crapping.

When someone say something that is false and yet they insisted what they are saying is true without confirming the validity of the fact, I must say I find it very irksome.

And when someone pointed out their foolishness, they insisted that they are still right then they are nothing but an imbecile.

Conclusion: Don't say something as if you knows about it when you don't even have the slightest idea of what your are trying to convey. Dumbo.