What does it mean that thinking about thinking is a skill?

Example: You're leading a technical design review. Halfway through, you notice a familiar sensation: you're defending a position not because the evidence supports it, but because you proposed it. You pause, say 'I think I'm anchoring on my own suggestion — let me steelman the alternative.' That pause is metacognition. The engineer next to you, equally smart, doesn't notice they're doing the same thing. The difference isn't intelligence. It's a trained capacity to monitor your own cognitive process while it's running.

Try this: Set a 30-minute timer during your next focused work session. Every time the timer fires, stop and write one sentence answering: 'What was I actually doing for the last 30 minutes, and was it the highest-value use of that time?' Do this three times (90 minutes total). You now have three metacognitive snapshots — a time-stamped record of the gap between what you intended and what you actually did. Most people discover at least one interval where they drifted without noticing.