9.19 Through experience procedural knowledge can become implicit, automatic refined strategies or skills initiated in familiar problems. (HOA.36)
9.20 Explicit knowledge prompts implicit representations and vice versa.
9.23 Procedural task knowledge relies upon knowledge of task objectives and the nature and structure of cognitive goals and subgoals.
9.24 Procedural task knowledge facilitates the selection and flexible application of task specific strategies to match cognitive goals supporting task completion. (HOA.38)
See other related assertions on page 162-163 in the book The Taxonomy of Metacognition.