It's funny that the ideas humans spend most of their time thinking and debating about are implicitly ideas about thinking and debating and yet they never really get around to thinking and debating explicitly about thinking and debating because the thinking and debating is actually about signaling object-level thinking and debating skills and not the less desirable meta-level ones. It wasn't really until the Greeks' development of rhetoric and logic that this trend was slightly reversed; now explicit meta-level reasoning has leaked down somewhat into modern-day implicit object-level reasoning, and explicit meta-level reasoning is a huge financial sector in the form of consultancy. But even so explicit meta-level reasoning is rarely seen in the wild.