It's not intended to be a strawman. I'm not sure I understand you - by "worlds" do you mean situations? I'm "introducing" them because that's how I think - if it's ok in the context of one "world", is it ok in this other "world", and if not, why not? What's different? If I can isolate that, I can understand. But I can't isolate the difference, despite lurking for years. That's why I'm asking. Because I've tried to understand, but I can't.
Something must be different to mean one is ok but the other is not, right? So in plain English, relating specifically to what we're talking about, what's the difference? Please don't reference foreign (to me) films or play on English, I genuinely can't follow it like you're intending, therefore meaning is being lost in translation.
Or, as contexts go, John Locke :-
http://enlightenment.supersaturated.com/johnlocke/BOOKIIChapterXIII.html
Thus, a company of chess-men, standing on the same squares of the chess-board where we left them, we say they are all in the same place, or unmoved, though perhaps the chess-board hath been in the mean time carried out of one room into another; because we compared them only to the parts of the chess-board, which keep the same distance one with another. The chess-board, we also say, is in the same place it was, if it remain in the same part of the cabin, though perhaps the ship which it is in sails all the while. And the ship is said to be in the same place, supposing it kept the same distance with the parts of the neighbouring land; though perhaps the earth hath turned round, and so both chess-men, and board, and ship, have every one changed place, in respect of remoter bodies, which have kept the same distance one with another. But yet the distance from certain parts of the board being that which determines the place of the chessmen; and the distance from the fixed parts of the cabin (with which we made the comparison) being that which determined the place of the chess-board; and the fixed parts of the earth that by which we determined the place of the ship,- these things may be said to be in the same place in those respects: though their distance from some other things, which in this matter we did not consider, being varied, they have undoubtedly changed place in that respect; and we ourselves shall think so, when we have occasion to compare them with those other.