November 15

Jim plans to go back a day into the past. To make sure that he doesn't do this over and over again forever, he writes a note to himself saying, ``On November 15, I, James Henle, sent myself back into the past. If you, James Henle, read this and have no memory of this event, then don't go back to the past again!'' He seals the note in an envelope addressed to himself and leaves the envelope on his desk. Jim tells Tom what he is doing. Tom again thinks this is dumb, but he is not sure why. If you agree with Tom, Click here.

If you want to try the experiment Click here.