Full Idea
Knowing which properties are typical of a class is particularly useful when you have to draw inductions about the members of a class.
Gist of Idea
Knowing typical properties of things is especially useful in induction
Source
Edouard Machery (Doing Without Concepts [2009], 4.2.1)
Book Reference
Machery,Edouard: 'Doing Without Concepts' [OUP 2009], p.84