[user104658]

Those aren't even the main problems, eyebahpah! Throw into the mix the fact that we already strongly hypothesise that "time" is not actually linear, it only appears so from our limited perspective of space-time. With that being the case; the word "before", in terms of existence, is actually meaningless. There is no "before", "after" or "now"... No beginning nor end... As all of those words are dependent on the linear progression of time.