On 16 Feb 2016 at 15:43, Craig Berry wrote: > Regarding time: Basically, unless two events share a "light cone" -- > that is, roughly speaking, the number of light-seconds separating > them in distance is less than the number of seconds separating them > in time -- those two events have no fixed ordering. Depending on > relative speeds, different observers will see the two events > happening in either order, or simultaneously. This makes it > impossible to talk about "now" meaningfully for anywhere other than > where you are. > > https://en.wikipedia.org/wiki/Relativity_of_simultaneity Of course the mere *existence* of jump trashes this. Pick any *two*: 1. relativity 2. FTL 3. strict *local* causality (you can have *global* casuality without local causality. Basic difference is between "causes alway precede events" and "in most frames causes preced events") -- Leonard Erickson (aka shadow) shadow at shadowgard dot com