If I own a chair and someone take it without me ok:ing it first, then it obviously isn't ok, since I wouldn't have any chair left. If, on the other hand, I had

If I own a chair and someone take it without me ok:ing it first, then it obviously isn't ok, since I wouldn't have any chair left. If, on the other hand, I had made a chair and someone looked at it and made a similar chair, then I would think it ok. This since I would still have my chair. See the difference?