Concerning the entry under Artistic License – Physics: "Using tunnels (wormholes) to travel interstellar distances is mentioned as an alternative to "FTL", which is possible but illegal due to the time travel implications. However, as far as physics is concerned wormhole tunnels already constitute time travel. In simple terms: if you have locations A and B one light year apart, and you go from A to B instantly, then you can see yourself a year in the past by looking back at A. You probably don't need information theory to see some of the problems this poses for causality."
This is incorrect. The light coming off of your ship is not "you". If you took a wormhole from location A to B and pointed a telescope at A then waited a year you'd be able to see the light that came off your ship a year ago but that doesn't violate causality any more than getting a letter that was lost in the mail for a year.
Concerning the entry under Artistic License – Physics: "Using tunnels (wormholes) to travel interstellar distances is mentioned as an alternative to "FTL", which is possible but illegal due to the time travel implications. However, as far as physics is concerned wormhole tunnels already constitute time travel. In simple terms: if you have locations A and B one light year apart, and you go from A to B instantly, then you can see yourself a year in the past by looking back at A. You probably don't need information theory to see some of the problems this poses for causality."
This is incorrect. The light coming off of your ship is not "you". If you took a wormhole from location A to B and pointed a telescope at A then waited a year you'd be able to see the light that came off your ship a year ago but that doesn't violate causality any more than getting a letter that was lost in the mail for a year.