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How to ThinkIn the Age of AI

Taxonomy Design

Formal System

The practice of creating hierarchical classification systems that organize concepts into nested categories with clear inclusion and exclusion criteria.

Linked Lessons

Classification is how you carve reality into categories

Compare Two Classification Systems for Your Task List in Notion

Explicit categories beat implicit categories

Document Your Email Folder Categories in Notion

Taxonomies are hierarchical categories

Build a Three-Level Taxonomy in Notion

Priority types enable triage

Build a Four-Priority Task Schema in Notion

Classification debt accumulates

Audit Your Notion Tags for Classification Debt

Reclassification is not failure

Redesign Your Note Tags in Obsidian

Classification reveals what you value

Map Your Classification Blind Spots in Notion

Cross-cutting categories

Tag 15 Notes Across Three Independent Dimensions in Obsidian

Good classification systems evolve

Map Your Tag Evolution in Obsidian

Hierarchies organize knowledge vertically

Build a Work Responsibility Hierarchy in Notion

Depth versus breadth in hierarchies

Audit and Rebalance Your Obsidian Folder Structure

Intermediate levels are for navigation

Design Navigation Layers in Notion

Flat is better than deep when possible

Flatten Your Notion Workspace Hierarchy

Inheritance in hierarchies

Map Property Inheritance in Your File System Using Miro

Override when inheritance fails

Document Inheritance Exceptions in Notion

Hierarchy refactoring

Restructure an Overcrowded Folder in Obsidian

Multiple valid hierarchies for the same data

Build Three Visual Hierarchies in Miro for Your Project List

Hierarchies encode priorities

Audit Your Notion Workspace Top-Level Structure

Progressive disclosure through hierarchy

Build a Three-Layer Summary in Notion

Balance your hierarchy

Map Your Folder Depth in Miro to Find Structural Imbalances

Hierarchical thinking is a fundamental cognitive tool

Map Your Daily Systems' Hierarchies in Miro

Evolution pace varies by domain

Map Your Schema Update Cadences in Notion

Schema inventory

Build a Schema Inventory in Notion