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Economical Writing, Third Edition: Thirty-Five Rules for Clear and Persuasive Prose (Chicago Guides to Writing, Editing, and Publishing)
amazon.com
"How to clarify a concept you can't articulate:
1. Change mediums. Draw it. Photograph it. Sing it.
2. Change levels. Explain what is one level up (bigger picture) or one level down (finer details).
3. Change fields. What would this concept look like in different fields?"
(James Clear newsletter)