Explanation: The initial introduction to the ideas and concepts in a classroom or in research is often a verbal overview and potentially a whiteboard. There is sometimes interactive engagment between the speaker and audience which allows for questions and monitoring how well the content is conveyed.

Who does this work: human presenter (teacher, researcher)

Motive for doing this work: convey or develop knowledge

1. lecture video
2. hand-written notes
3. Latex document
4. Content tags
   • section document structure
   • tagging words
   • expression semantics
5. tags for sections and words and expressions
6. concepts to variables
7. all steps
8. derivation graph
9. replace symbols with numeric ID
10. validation of steps
11. validation of dimension
12. proof of inference rule