I think the key is that in the short story everything has to be explicable from both a linear and non-linear perspective, just like you can describe physics bot

I think the key is that in the short story everything has to be explicable from both a linear and non-linear perspective, just like you can describe physics both ways. If Louise had called up her daughter and told her not to go rock climbing that would not be explicable from a linear perspective and is thus impossible.