WARNING! ANYONE WHO HAS NOT SEEN VANILLA SKY SHOULD NOT READ THIS POST BECAUSE IT REVEALS THE ENDING. OR COVER UP THE MARKED AREA.

Protobon,
you're just copying dkv now. I say you are an idiot! Prove ME wrong.

It's impossible - because I may be an idiot myself, therefore any logical proof you give me I may ignore. Then you have all these definitions, ambiguities and misunderstandings to deal with... And finally,

STOP HERE!

there is always the possibility of a vanilla sky type situation in which nothing can be said to be truly real.

CONTINUE HERE:

Maths has limitations too. My maths with mechanics lecturer says that the statistics lecturers still argue over un-resolved methods of calculating certain things (I may have got the wrong end of the stick, if I have, please correct me)

My point: you can't give 100% proof of something being true or false. All you can do is weigh out the evidence for and against it, and BE LOGICAL in your final decision.