Hi.

There's only 1 problem with that I can see and it's a bit of a paradox.

If time travel exists then it would have to be from the future so it hasn't
happened yet even if it has. Assuming that it has already been done it would
have been done in such a way as to not to interfere with history. But even
then if it did meddle with history we wouldn't know anyway because we would
be a part of it. so I see that much of it as a bit of a chicken in egg
situation. 

-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Dennis Towne
Sent: 13 August 2012 18:33
To: Gamers Discussion list
Subject: Re: [Audyssey] FTL in games

Thomas,

FTL is one of those grey areas in physics, and unfortunately we
haven't observed any physical object or piece of information going
faster than the speed of light.  Ever.  Tachyons are hypothetical, and
not even on very good theoretical footing - they're just something
that's been conjectured as a possible solution to certain problems,
but there are other solutions that are probably better.

General relativity is very tightly linked to both faster than light
travel and time travel.  If you have general relativity and FTL, you
by definition have time travel.  If you have general relativity and
time travel, you by definition have FTL.  There's absolutely
nothing you can do about this - that's just the way the math works in
general relativity.

So that's what the theoretical/math side of things says about it.  But
what does the real world have to say about it?

1) It looks like the universe has general relativity in it.  General
relativity has been tested a ridiculous amount, and it's probably the
second most well tested theory in the history of mankind.  It's safe
to say that 'general relativity exists'.

2) We've never seen a single example of FTL.  Ever.  In the entire
history of mankind.

3) We've never seen a single verified example of time travel.  Ever.
In the entire history of mankind.

That gives us a pretty strong indicator that with the way the universe
is set up, we'll probably never have FTL as discussed in sci-fi.  If
we did, we'd have to deal with time travel too, and there's no
evidence for either in spite of a lot of very smart people trying to
do it for a really long time.

I'll post game related specifics in the next note, because I'm sure
someone is going to argue stuff I've said here.


Dennis Towne

Alter Aeon MUD
http://www.alteraeon.com


P.S. for pedantics:  the usage of FTL in the above is the standard
strict "information transfer" definition used when defining the light
speed limit in relativity; please do not needlessly pollute the
discussion with apparent velocity or waveform-leading-edge arguments,
as it will simply cause confusion on what is already an unintuitive
topic.


On Mon, Aug 13, 2012 at 12:57 PM, Thomas Ward <[email protected]>
wrote:
> Hi Phil,
>
> True, but FTL is as yet in opposition with known physics. As I
> understand it nothing can travel faster than the speed of light. It is
> the great constant in physics. There are tacions that move faster than
> light, but nothing else in known physics can do it.
>
> The other problem that makes FTL implausible is inertia. How exactly
> do you go from 0 KPS to 300,000 KPS without the people inside the
> spaceship being smashed into jelly?
>
> My point being while FTL is common place in books, movies, and video
> games no one has a clue how to get around the laws of physics and make
> it truly plausible. That's why it is called science fiction. :D

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