A lot depends on whether you are calling "a future" or "the future". In the first case, you may make different choices and go a different route than the version you talk to. In the second, the only time loops that exist are stable ones, so that even if the events of that period go through a number of itterations, the only sequence of events anyone will remember is the one in which you will go through whatever your future self has been through. The second case still allows for a lot of "cheating" in various ways. See Harry Potter and the Methods of Rationality for a good portrayal of this.
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No, I don't believe the world has gone mad. In order for it to go mad it would need to have been sane at some point.
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No, I don't believe the world has gone mad. In order for it to go mad it would need to have been sane at some point.