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arguments
are either valid or invalid
what is an extensional definition?
indicates the set examples or types to which the term applies
what are the kinds of extensional definitions ?
ostensive
enumerative
by subclass
ostensive defintion
literally involves pointing to members
enumerative defintion
lists the individuals (never kinds)
by subclass
lists kinds or groups (not individuals )
intensional definitions
indicates the characteristics a thing must have in order to be considered a member of the class
what are the kinds of intensional definitions ?
- lexical
- stipulative
-precising - theoretical
lexical defintion
traditional , customary or common use of term
stipulative definition
dictates a meaning for a certain context or purpose
premising defintion
makes a lexical definition more exact for some context or purpose
theoretical definition
tries to express a perfect understanding of the essence of what the term is talking about