Cite?!?

[Gyrate]

@Mangetout

That’s nice, and all, but careful reading of the question can save time and effort. The OP didn’t ask for proof. Just a citation.

And I cited a proof. I doubt it took any more time or effort than the other cites in this thread.

[Lukeinva]

@Lumpy

2+2=4

The world is round

the sky is blue

The world is round cite.

[azraiel]

2+2=22

[tdn]

@Lumpy

2+2=4

Pictures or it didn’t happen.

[FordPrefect]

@Lumpy

2
the sky is blue

Not at night…

[Lumpy]

@Giles

Well, it all depends on how you define things. Let’s take the following definitions:
2 is defined as 1+1
3 is defined as 2+1
4 is defined as 3+1

Then:
2+2=2+(1+1)=(2+1)+1=3+1=4

Quod erat demonstrandum

“Oh, you say that because you are a man!”

• from The Life and Times of Ezekiel Bulver
  (as told to C.S. Lewis)