1. Picasso, seeing and asking questions
2. Descriptions, explanations and knowledge
3. Knowledge, personal circumstances & seriousness
4. Analogies, understanding & justification
5. Theories and their limitations
6. How present knowledge depends on past knowledge
The actual titles are availble courstesy of : https://www.reddit.com/r/IBO/comments/cyn9i2/tok_essay_titles_may_2020/
Good luck!