Originally Posted by
Logos
To generalize too liberally for a second, there appear to be two general typing methods at stake. The first method is essentialism which draws a vertical line and claims that lines marks the "essence" of a type. In order for a person to qualify as a type, they must stand on or exceptionally near this line. This line may be a particular type description, a celebrity benchmark, or a person's preconceived notion of a type through a personal benchmark. The second method draws two distantly-gaped parallel lines and claims that a person must fall within those ranges to be of a type.
While both approaches have their pitfalls, I personally prefer the second approach which allows for greater deviation from a normative ideal and is, typically, less insistent on the defining "essence" of a type. The second approach necessarily involves defining the parameters of the type range by constantly moving the lines closer or farther apart, but I have noticed that people of this second method are less reluctant to change their type conceptions with additional facts than those who think in terms of the first method.