What does category mean?

In philosophy, category (Greek: κ α τ η γ ο α) refers to the * * * homogeneity on which things are classified. For example, time {time/period}, space {distance/volume}, texture {mass/density} and relationship {absolute/relative} are all categories. In taxonomy, category refers to the nature of species. It is not the category itself, but the natural basis for classifying things.

Category is the most abstract concept of propositional structure, and it is the most important and core concept in philosophy and its logical system. A large number of specific categories have undergone numerous perceptual verification and rational deduction, and become highly generalized and structurally stable concepts in human abstract thinking achievements.

Extended data:

For example: intrinsic connotation {ontology/strain}, intrinsic extension {raw material/value}: raw material {texture ∨ space ∨ time}: texture {mass/density}, space {distance/volume}, time {time/cycle}; Value (order of magnitude/value); Ontology {connection/restriction} and this change {combination/division}; Relationship (absolute/relative); Attitude {single ecology/multi-ecology}: single ecology {active/passive}, multi-ecology {free/authoritarian}: free {free/interconnected}, authoritarian {master/slave/single control}; State (continuous/discrete);

Natural extension (individuality/collectivity), natural connotation (generality/variation) and essential connotation (characteristic/variation); Thinking {concreteness/abstraction}: concreteness {individuality/image}, abstraction {set/symbol}, and so on. Among them, nature {ontology/variation} is the ultimate abstract category, which is directly abstracted from countless perceptual facts, and it is unnecessary and impossible to prove it deductively. All concepts at all levels below it can be directly or indirectly derived from it.