Dumb
Uh huh. Yeah. I'm right on that, didn't you knew?
YOU are the dummy, uh huh, and this is right, because the wiki says it so. Stay in anger, yup.
Explaination
There is no need for a explaination because you ARE the dummy dum dum. You won't understand what I will say if I do one. Don't search for one, it's you, and that's it.
Reasons
First of all, when we ask you how much is 9+10, you will respond "21". Nuh uh, that's not how it works! Therefore you are dum. I won't tell you the answer because else you will cheat on me, dummy.
Surnames
We know it's you, so there's alot of them, we can call you dum, dummy, dum dum, brain dum, dumb, dumbie, dumbers, dumberner, dummy, dummier, redummyiers, super dummy, mega dummy, dumdumdum, and the final, superomegaalphaultradum.
Overall
You are dumb. This is proven by the Federal laws and scientifically proven by a hundred of scientists, including the one in HL1. You are the dum dum and you will stay as is. Sorry, life is pain, but your life is dum.