natural kind terms definition
In analytic philosophy, the term natural kind is used to refer to a natural grouping, not an artificial one.ence  raven  and  black  refer to concepts that match natural kinds, because any black raven constitutes at least some evidence that all ravens are black. But nonblack and nonraven are not, because a nonblack nonraven (an extremely wide category) is not evidence that all nonblack things are nonravens.