2.2 Reflective thinking is the foundation for the development of problem solving strategies which are integral to metacognition and essential in complex contexts.
2.3 Judgments, self-monitoring and self-regulation are reflective processes imbued in problem solving.
2.4 Challenges to beliefs and doubt stimulate reflection and instigate problem solving strategies.
2.5 Reasoning relies upon reflection, mental imagery, mnemonic strategies, analysis and abstraction, and is essential for complex problem solving.
See other related assertions on page 16 in the book The Taxonomy of Metacognition.