Frequently asked questions about thinking, epistemology, and cognitive tools. 1480 answers
Many real categories are organized around a central example rather than strict rules.
Items that do not fit neatly into any category expose weaknesses in your system.
Items that do not fit neatly into any category expose weaknesses in your system.
Items that do not fit neatly into any category expose weaknesses in your system.
Items that do not fit neatly into any category expose weaknesses in your system.
Pick one category system you use regularly — your task labels, your filing structure, your mental model of your team's roles, or your definition of 'done.' Find three items that don't fit cleanly into any single category. For each, write down: (1) which categories it partially belongs to, (2) what.
Treating boundary cases as exceptions to ignore rather than evidence to examine. The instinct is to force the ambiguous item into the nearest category and move on — filing the tomato under 'vegetable' and forgetting about it. This preserves the illusion that your system is complete while.
Items that do not fit neatly into any category expose weaknesses in your system.
Sometimes you need to classify the same items along multiple independent dimensions.
Sometimes you need to classify the same items along multiple independent dimensions.
Sometimes you need to classify the same items along multiple independent dimensions.
Sometimes you need to classify the same items along multiple independent dimensions.
Sometimes you need to classify the same items along multiple independent dimensions.
Sometimes you need to classify the same items along multiple independent dimensions.
Choose a collection of 15-20 items you currently organize in a single-dimension system — notes in folders, tasks in lists, bookmarks in categories, contacts in groups. Identify three additional dimensions along which those same items could be meaningfully classified. For each item, assign a value.
Two failure modes bracket the problem. The first is dimensional poverty: classifying items along only one dimension and treating it as sufficient. You file notes by topic and then cannot find the ones relevant to a project. You sort tasks by status and then cannot identify which ones belong to a.
Sometimes you need to classify the same items along multiple independent dimensions.
Categories reduce complexity by treating similar things as equivalent for a given purpose.
Categories reduce complexity by treating similar things as equivalent for a given purpose.
Categories reduce complexity by treating similar things as equivalent for a given purpose.
Categories reduce complexity by treating similar things as equivalent for a given purpose.
Pick one classification system you use daily — your email labels, your task priorities, your contact groups. Write down three things that system compresses away (details it ignores) and three things it preserves (distinctions it keeps). Then ask: is the compression ratio right? Are you losing.
Two failure modes in opposite directions. Over-compression: you reduce so aggressively that distinctions which matter for your decisions disappear — like triaging all customer feedback into 'positive' and 'negative' when the actionable signal lives in the subcategories. Under-compression: you keep.
Categories reduce complexity by treating similar things as equivalent for a given purpose.