tufte-analytical-designlisted

# Tufte: Principles of Analytical Design ## Overview Analytical design is design in service of reasoning. Tufte's six principles, derived from Minard's 1869 map of Napoleon's Russian campaign, define what separates displays that assist thinking from those that merely perform it. The core claim: design principles are not arbitrary aesthetic choices — they are derived directly from the cognitive tasks required to reason about evidence. A presentation that violates these principles is not just ugly; it impairs thinking. > **Naming convention:** Failure-mode labels in this skill (Floating Fact, Forced Flatland, Mode Segregation, etc.) are descriptive teaching names, *not* Tufte's own terminology. Only quotes and page-cited phrasings reflect his exact words. Use the labels for diagnosis; don't attribute them to Tufte. --- ## §1. The Grand Principle: Design Follows Thinking The source of all six principles is one meta-principle: > "The principles of analytical design are derived from the principles of analytical thinking." — Tufte, *Beautiful Evidence*, p. 137 Cognitive tasks drive design decisions. If the intellectual task is comparison, show comparisons. If the task is causal reasoning, show causal structure. This is not a metaphor — it is the literal derivation rule for every choice in information display. **Consequence for practice:** Before any design decision, name the intellectual task. The design choice follows from that, not from brand guidelines, template defaults