«فالتعريف إن كان بالجنس القريب والفصل القريب يسمى حداً تاماً»
If a definition uses the proximate genus and proximate differentia, it is called a complete essential definition.
Example: الإنسان حيوان ناطق
The human is a rational animal.
“Animal” is the proximate genus; “rational” is the proximate differentia. Together they identify both the encompassing essential class and what differentiates this species within it.
It is complete because the two appropriate essential components are present.