Hierarchy of Ideas
also Levels of Abstraction · Spiderweb of Knowledge
Knowledge organized in layers from concrete details up to high-level concepts, cross-connected so any idea can be unwrapped to inspect what it was built from.
A hierarchy of ideas is knowledge structured in layers: concrete details at the bottom, with related items grouped and re-grouped into successively higher-level concepts. You learn many small things, notice some are related, and integrate them into one unit; repeating this upward yields abstractions that stand on lower ones. Crucially the structure is not a strict pyramid but a spiderweb — a level-four idea can draw on items several layers down and connect sideways, so the dependencies run in many directions.
CF inherits this from Objectivist epistemology (see conceptual hierarchy) and puts it to specific work. Because each high-level idea is built from lower ones, it can be unwrapped: you trace back down to see where it came from and where each underlying piece came from. Holding only the top layer means you do not really understand it. This makes the hierarchy a tool for error correction — contradictions and missing supports become inspectable rather than hidden inside an opaque conviction.
CF ties the hierarchy to cognitive load. Building many reliable layers requires that lower ones be automatized so the conscious mind is freed for new work. A weak prerequisite layer caps how high you can build; when people get stuck, the fault is often a layer or two earlier, not the current one. This integrates the hierarchy with CF’s accounts of prerequisites and non-contradictory integration, where ideas must fit together without conflict rather than merely accumulate.