Fnord wrote:
I think that since the OP was only an opinion, or I'd be ripping into the complete lack of both reason and evidence for the claim.
Retrograde time travel violates causality and conservation of energy and matter; and evolution moves forward, not backwards.
Enough said.
yes,no evidence,just an fantasy,so we can discuss if beyond the current science.so it really impossible?
in the future human have no body,just exist as Brain waves,and in an accident or other reason,some of them retrograde time(maybe another way not by Current Physical laws) back to this time,so they can't understand people in this time,can't know they body well.......because in the future human are totally individually,no body,so no sense organ,no sexuality,no appetite,no sex,and if they are meet each other,there are nothing gonna happen or they fall in love(this love is not like the love in our time),the two in love will be as one,just one,they totally belong to each other,no argue,no criticize,they know everything about each other and accept all of it.when they come back to this time,they keep the manner of the future in the most deep subconsciousness,and it control all the behaviors,but they have body,have desire,they need food,sex,love,and it seems not so right because of the subconsciousness.so they can't handle many things in this time.