"Just to make my definition of rational clear: Rationality is only intelligible when in the context of a goal (whether that goal be rational or irrational). Now, if one acts rationally, given their information set, will chose the best plan-of-action towards succeeding their goal."

I request further clarification.

So if someone can't articulate why they're choosing one way over another, but tends to choose the strategies that maximize the likelihood of reaching their goals, they're being rational by your definition? What if they don't recognize that their choices tend to be optimal, explicitly or otherwise?