Saturday, March 28, 2009

Proof by Contradiction

A very good example, if you don't already know what this proof is about:
















Assume the man in green is YOU.

However, YOU can only see this poster, if YOU are in the train. Therefore, by Proof by Contradiction, YOU cannot be the man in green.

Q.E.D.

2 comments:

wh said...

i think you can also see the poster if you are standing at the door right

cc said...

no mah, you have to stand in the train to see the poster, the guy in green is standing outside