Haha well it’s one more hurdle towards a likely impossible challenge. My bet is that it’s not the hardest one, so no I don’t think it’s plausible that we would solve all the other issues with time travel and forget to offset position. But I could be missing some of the complexity of the positioning problem.

However it makes for a good Evil Genii story where a guy wishes for a time machine and the genii gives him one but leaves this part out.