Time travel
Can anyone think of an economic proof of time travel is impossible?
I have got an idea after MT Cheung's class, let see whether it will convince you.
Proof:
Interest rate determines the relative price over time for the same commodity.[1]
If time travel is possible, there will be an arbitrage oppounity if the price of the same good over time is different, which means, if there is interest, people can gain by "buy low sell high".
The above implies, under ideal situation, interest rate = 0 if time travel is possible. We observe that, generally speaking, interest rate is not equal to zero in our world.
So not B ---> not A, time travel is impossible. Q.E.D.[2]
Notes:
[1] You may refer to I.Fisher's "Theory of Interest".
[2] Q.E.D. stands for "Quite Easily Done".
I have got an idea after MT Cheung's class, let see whether it will convince you.
Proof:
Interest rate determines the relative price over time for the same commodity.[1]
If time travel is possible, there will be an arbitrage oppounity if the price of the same good over time is different, which means, if there is interest, people can gain by "buy low sell high".
The above implies, under ideal situation, interest rate = 0 if time travel is possible. We observe that, generally speaking, interest rate is not equal to zero in our world.
So not B ---> not A, time travel is impossible. Q.E.D.[2]
Notes:
[1] You may refer to I.Fisher's "Theory of Interest".
[2] Q.E.D. stands for "Quite Easily Done".
posted by Outlaw at 11:23 am
5 comments
