From: bcr@cernapo.cern.ch (Bill Riemers)
Subject: Re: Paradox-Free Time Travel (part 4 of 5)
Organization: CERN, European Research Center for High Energy Physics
	<C5t-RD_@engin.umich.edu> <19t3f8INNjmq@usenet.INS.CWRU.Edu>
	<BCR.92Sep25174227@hpl3sn02.cern.ch>
Date: Sat, 26 Sep 1992 11:41:54 GMT

In article <BCR.92Sep25174227@hpl3sn02.cern.ch> bcr@cernapo.cern.ch (Bill Riemers) writes:

>  1)  I don't see why I have to do these things individually.  First I get one
>      gold coin.  I then set up a smelting pot at my recieving station.  Then,
>      I throw in the coin and crank up the heater to start it melting down.
>      While that is heating up, I transmit myself 10000 years in the future.
>      When I first arrive I notice that someone has already taken all but one of
>      my coins, but that is ok.  Why?  I'm now moving backwards in time and I'm
>      the one who will take them.  So now as coins start appearing from the past I
>      throw them into my transmitter, so they can join the "others" in my
>      melting pot.  When I have collected enough to fill my pot, I stop collecting
>      coins, making sure I remember to leave one.  Now I arrive back in my 
>      original time stream and mint the coins.

Help me out here.  I've been thinking about this more and have come up with a revised
senerio.  Lets do this as a log book of the time traveler.  (All times are taken from
the watch he is wearing.)

10:05  Finished setting up the melting pot.  I've just inserted the first coin.

10:15  Time machine ready.  I'm now traveling exactly 50 years into the future.

10:30  Arrived in my lab at the on the desired date.  I should now be traveling backwards
       in time.  I will test this.

10:45  I took a nickel out of my pocket and placed in on a book shelf.  The nickel and placed
       it on the now titled floor.  The nickel still travels in the same direction of time as
       I am and rolls downwards.  When I went to retrieve the nickel, I found a penney lieing
       next to it.  I placed this penney on edge on the floor and it proceded to roll upwards
       bounce twice, and then land on the table on edge.  I then quickly grabbed it and placed
       back in my piggy bank (on the table) where it belongs.  This seems to be sufficient
       proof that I am heading backwards in time.

12:45  I finially finished setting up the time transmitter.  I will now tackle the safe.

12:55  Fortunately the safe lock had rusted away.  I didn't like the idea of a trip farther into
       the future.

13:10  Something is wrong with my theory.  No coins have arrived.  I will now head back to the
       lab.  At least I have one extra coin for my troubles.

13:25  Arrived back at the lab.  I've added the new coin to the first.

13:30  I've finished minting the coins.  I've locked both of them in the safe with the lost
       combination.  I estimate it will take 50 years for the lock to rust.

13:35  Opps, I guess this is a paradox I now seem to be fading away.

13:10  Something is wrong with my theory.  No coins have arrived.  I will now head back to the 
       lab.  At least I have one extra coin for my troubles.

13:11  Just as I started to take apart the time transmitter, the coins started arriving.  As
       soon as they arrive I've been placing them in the safe.

13:15  The coins stopped arriving befor the safe was filled.  I guess there is still a problem
       with my theory.  I'll take the coin in my pocket with me so I will be a little closer
       to my goal.

13:30  Arrived back at the lab.  I've added the new coin to the first.

13:35  Maybe my theory wasn't completely wrong.  Some coins did arrive in the time reciever.

13:40  I've finished minting the coins.  I've locked all of them in the safe with the lost
       combination.  I estimate it will take 50 years for the lock to rust.

13:41  Opps, I guess this is a paradox I now seem to be fading away.

13:10  Something is wrong with my theory.  No coins have arrived.  I will now head back to the 
       lab.  At least I have one extra coin for my troubles.

13:11  Just as I started to take apart the time transmitter, the coins started arriving.  As
       soon as they arrive I've been placing them in the safe.

13:30  The coins stopped arriving as soon as there was only room in the safe for one more coin.
       I've put the one coin left in my pocket and placed it in the safe.  I want to make sure
       I will remember to include all the coins.

13:45  Arrived back at the lab.  I've added the new coin to the first.

13:50  My theory was right.  All of the coins arrive in the time reciever.

13:55  I've finished minting the coins.  I've locked all of them in the safe with the lost
       combination.  I estimate it will take 50 years for the lock to rust.

14:00  I'm now going to secure the lab for the next 50 years.

And so ends our first sucessfull experiment in duplicated matter.  Maybe next time our
scientist will get braver and dare to make printed circuit boards out of the gold...

It seems like the last sequence of events is not paradoxical.  But what happens if forexample
our brave scientists fails to make any of the coins with the same mass as the original coin?
What if the newly minted coins are a) too small b) too large?  What happens if he gets greedy and
decides to take the coin from 50 years later with him anyways?

                                                 Bill