Laws of the Conservation of Time

These laws apply no matter the method used to travel time, a technological device or magical artifact. In short time travel is a Bad Thing. This will not end well.
<OL>
<LI> Time is not a singular flow. </LI>
<LI> Energy required to change future events decreases logarithmically as the factor of time increases. If X change requires Y power for +t time, then X change requires y/10 power for +t2.</LI>
<LI> Energy required to change past events increases logarithmically as the factor of time increases. If X change requires Y power for -t time, then X change requires y10 power for -t2.</LI>
<LI> Time Travel never works like you think it will. The past is immutable. If you think you have changed the past, you have simply side slipped into a parallel universe. Past travel is highly likely to land you permanently away from home. </LI>
<LI>Future travel is a drug trip. The future is so mutable that nothing that happens can be counted on. By the very act of looking at a possible future you could prevent it happening.</LI></OL>
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META: I developed these rules to discourage time travel. I did not wish to declare by GM fiat that time travel was impossible, so I created a circumstance by the Laws of Nature that make it very hard to do. I do not expect that anyone else will use them, unless you also wish to discourage time travel. -- Garry
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