Division and Classification

Definitions and rules related to the logical processes of division and classification as presented in the lecture notes.

Division

The process of separating a thing into its parts or resolving a whole into its components, involving the breaking down of a class into subclasses or individual members.

Classification

The process of grouping individuals with common characteristics together to form a class.

Physical Division

The process of breaking an individual object into its actual component parts, such as subdividing a human body into head, torso, arms, legs, and feet.

Logical Division

The disassembly of a universal concept into sub-concepts or the reduction of a term to its referents.

Tree of Porphyry

A classic example used to illustrate logical division, showing the descent from "Substance" down to "Individuals" like Pablo, Pedro, and Juan.

Metaphysical Division

Analyzing an object based on the constituent qualities or elements that make up its essence or nature, such as defining "Man" as a rational, sentient, living, bodily substance.

Consistency (Rule of Division)

A rule stating the same basis or foundation must be used throughout the process to avoid the fallacy of cross division.

Cross division

A logical error occurring when multiple bases are used simultaneously during the process of division.

Exhaustiveness (Rule of Division)

The requirement that division must be adequate and complete, ensuring all parts of the whole are enumerated without omitting any group.

Clarity and Order (Rule of Division)

The principle that the division process should be lucid, with reasonably few parts focusing on main classes followed by subdivision.

Natural Classification

Grouping things according to natural or essential attributes or structures, such as classifying animals into viviparous and oviparous.

Artificial Classification

Grouping things based on conventional or arbitrary characteristics, such as grouping patients by whether they use wheelchairs or crutches.

The Golden Rule of Classification

The principle that entities should always be classified according to their most common essential attributes.