Rules for Definitions
Essential Attributes

The term "essential" means fundamental: An essential attribute causes or explains the existence of other attributes.

Example:

The heart is an organ that goes "lub-dub, lub-dub".

The "lub-dub" sound is a superficial trait; it is merely a by-product of the heart's essential function, which is to circulate the blood.


A Genus and a Differentia | Neither Too Broad Nor Too Narrow |
Essential Attributes | Avoid Circularity | Avoid Negative Terms | Avoid Vagueness

Rules for Definitions

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