If you were transported 400 years into the past with no clothes or anything else, how would you prove that you were from the future?

@Rokasu [quote]I could probably build a computer.[/quote]

Using what materials? and if you succeed, using the tools of the time, why would anyone believe you're from the future?

@Northwest Computer is a fairly general term.

The abacus has been around for 15 centuries or so, and yes, you can build mechanical computers, using the tools of the time, but that would only prove you’re smart, not a time traveler.

@Rokasu

@Northwest You’re taking this a little too serious.

@Rokasu I agree.