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What does classifying mean?
It means grouping things into genuses and species according to similarities and differences.
What is the difference between genuses, referents, and species?
Genuses are broader or more abstract-- meaning the groups of objects that are different from one another
Species are more narrow, but not as concrete as referents.
Referents are concrete, individual objects.
What does mutually exclusive mean?
Mutually exclusive means that no referent belongs to more than one species.
In other words, there are no overlapping groups.
What does jointly exhaustive mean?
Jointly exhaustive means all referents belong to at least one species.
In other words, no object can belong to less than one group.
What defines a consistent principle?
A consistent principle is mutually exclusive and jointly exhaustive, as well as being essential and creating separation between the categories.
How can I tell if a system of classification does use a consistent principle?
You can tell there is a consistent principle if all species have the same concept or idea applied to them.
How can I tell if a system of classification is mutually exclusive?
You can tell if all referents belong to a species.
How can I tell if a system of classification is jointly exhaustive?
It is jointly exhaustive if every referent belongs ot a species.
What is the purpose of a definition?
-clarify boundaries of a concept
-clarify relationships among concepts
-summarize key facts about referents
By what three methods can we define a concept?
Example, synonyms, and genus/differentia
What is a definition's purpose?
A definition clarifies the boundaries of a concept and the relationships among concepts. It also summarizes key facts about the concept's referents.
What are a definition's methods?
What is differentia?
Differentia is the defined object's characteristics separating it from other things in the genus. It can also be defined as attributes that differentiate the object from other species.
What is a consistent principle based on?
An essential attribute
What should a consistent principle give us?
It should give us classes that are mutually exclusive and jointly exhaustive.