Why do they have to have choice in the then now ? Is not choice in the now noew enough ?
because in a non deterministic reality, there is no 'past' or ;future' there is only the now, and 'possibilities'. When an object travels to Point B, they change that reality, even if only by their presence. At which point all the dice need to be rolled all over again.
I took the recent WoJ as indicating that there's a branching tree of realities arising from every point of exercise of free will anyway.
If that was intended as metahumour at the "this statement floats in a void with no causal connection to anything preceding" level, I salute your subtletly. If not, I'll have to ask you to unpack your reasoning a bit more.
mm ill try to unpack. I don't believe in a non deterministic universe actual time travel is possible; for example when your traveler gets into his machine at point 2013, and travels to 1961, he creates first two alternates futures:
one in which he did travel, and one in which he did not
and then two more alternate pasts...it goes exponential from there
maybe its all my marvel comics leaking thru, but at least here, its impossible to travel to your actual past or your future (because of paradox) you can only travel to your alternate past and or alternate future.