An essential definition (hadd) draws on intrinsic constituents, especially differentia. A descriptive definition (rasm) uses a property connected to the species but outside its essence.
“Human is a rational animal” uses the differentia “rational” and gives an essential definition.
“Human is an animal capable of laughter” uses a property and gives a descriptive definition.
Both contain “animal.” Their difference lies in the logical status of the final feature, not in the number of words.
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Definition and Its Four Forms: Complete/Incomplete Essential and Descriptive Definitions
An essential definition (hadd) draws on intrinsic constituents, especially differentia. A descriptive definition (rasm) uses a property connected to the species but outside its essence.
“Human is a rational animal” uses the differentia “rational” and gives an essential definition.
“Human is an animal capable of laughter” uses a property and gives a descriptive definition.
Both contain “animal.” Their difference lies in the logical status of the final feature, not in the number of words.