That would be a conditional logic system, not reasoning system. By your logic, aimbots are reasoning systems. It's simple math with some if/then operators sprinkled inbetween.

A proper reasoning system implies some kind of inference, manipulation, logical chaining, or at least the ability to justify/modify its own choices outside of pre-coded logic. NPCs don’t do that. They just follow hand-crafted rules, or at best, utility scores (shoot now, run later, hide if health < 30).