I never studied philosophy, so am not to good at it, but the choice/thought thing sounds like a cusp action. A point along your timeline that you have a "major" decision to make. At the point of making that decision, your future shifts to one or the other possible outcomes. Throughout our lives we make lots of choices, most of them minor, with a few major "cusp" along the way.

I liked how "Chester" explained it in W.M. Gears book "The web of Spider" - I like sci-fi, what can I say.