Final answer:
Pre-questioning ideas can be sourced from textbooks, teachers, and study groups to enhance critical thinking skills.
Explanation:
Pre-questioning ideas can be found in a variety of sources such as textbooks, teachers, and study groups. Textbooks often include summaries, glossaries, and comprehension questions. Study groups are beneficial for discussing and refining ideas, but it's essential to verify conclusions with an expert. Developing an 'inner Socrates' mindset can help challenge and improve critical thinking skills.
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