[ExI] Faster than light??

[Anders Sandberg]

Tomaz Kristan wrote:
> > End of relativity, end of causality, ability to signal backwards in 
> time.
>
>
> IF some assumptions of relativity are correct, only then FTL particles 
> would mean ability to signal backward in time. Only then.
>
> But if the Relativity is even more wrong, then no signaling backward 
> in time. That the transluminal speed means travelling back in time is 
> a solely relativistic concept.

How do you patch together the symmetry group of space if you want to 
keep causality for the hypervolume outside the lightcone while keeping 
the familiar (and empirically tested) Poincare group inside?

-- 
Anders Sandberg,
Future of Humanity Institute 
James Martin 21st Century School 
Philosophy Faculty 
Oxford University