Is time travel possible? Have you ever tried? Have you ever succeded? Are you sure you haven't? Samuel Grundy did, he tried, he tried so hard that he accomplished it, but he doesn't know it.

Samuel thought to himself I've already completed what's in the past, haven't I? So If it's already been done can't it be done again? The past three minutes are still vividly clear in my mind, as long as I can picture my enviroment I should be able to travel at least three minutes back in time. He tried and was succsesfull, unfortuanatlly when he tried everything was set back to three minutes in the past, including his memory.
Samuel was lucky he only ever thinks of time travel exactlly one second after he had the previous time. Everytime he forgets that he has accomplished time travel and is now living, ONE SECOND AT A TIME.
Have you ever tried to time travel? Are you sure? How many times will you read this post? Can you be sure? Will you ever be sure?