2 published lessons with this tag.
Real knowledge often has items that belong to multiple parent categories. When you force every concept into a single branch of a tree, you destroy information. Lattice structures — where a node can have multiple parents — preserve the multidimensional nature of knowledge. The tree is a special case. The lattice is the general case.
The same set of items can often be organized in several equally valid hierarchical structures. Each hierarchy foregrounds different relationships and obscures others. No single arrangement is canonical — the right hierarchy depends on what you are trying to see, find, or do. Recognizing this multiplicity is a precondition for deliberate knowledge design.