Well, let's consider:
More than likely, ruling out dopplegangers, clones, hallucinations, etc, the reason you'd suddenly be facing down a (seemingly older) bearded version of yourself is because your future self went back in time with the intention of mugging you. For whatever reason.
Considering this, if you choose to fight back, we will have one of two scenarios occur.
In one, you will defeat your future self. This will lead to you likely realizing the futility of traveling back in time to mug yourself. Meaning, your future self will never go back. Which leads to a paradox.
In the other, you lose to your future self; who likely walks away gloating about the new found money he took. In this scenario, you may feel a need for revenge. As such, you may end up deciding, at some point in the future, to go back in time and steal the money you lost in your youth. This essentially closes the loop.
In effect, our choices are:
* Win the fight, cause a time paradox
* Lose the fight, allow events to pan out
So...yeah. Losing is really the only option.
More than likely, ruling out dopplegangers, clones, hallucinations, etc, the reason you'd suddenly be facing down a (seemingly older) bearded version of yourself is because your future self went back in time with the intention of mugging you. For whatever reason.
Considering this, if you choose to fight back, we will have one of two scenarios occur.
In one, you will defeat your future self. This will lead to you likely realizing the futility of traveling back in time to mug yourself. Meaning, your future self will never go back. Which leads to a paradox.
In the other, you lose to your future self; who likely walks away gloating about the new found money he took. In this scenario, you may feel a need for revenge. As such, you may end up deciding, at some point in the future, to go back in time and steal the money you lost in your youth. This essentially closes the loop.
In effect, our choices are:
* Win the fight, cause a time paradox
* Lose the fight, allow events to pan out
So...yeah. Losing is really the only option.