Firstly, I'd like to state that I rated it 4 stars out of 5 and not 5 just because I liked the story so much and I wished it wasn't a short story. There was room for much more storytelling in it.
Rael's creative mind presents us an original concept, whose roots, I suppose, come from the fact that Rael is a Physicist. As such, none of the phenomena described in the story is in conflict with our actual knowledge about the Universe's laws. Rael's scientific views come apparent already in the title: "Causality" is much more than a word, as it would be in a general author's work. On the contrary, in Rael's hands, "Causality" acquires its true meaning.