Everyday Objects & General Categories

How to test this connection

Try a shared action, property or assembly before inventing a location. For parts, check how they belong to the object; for actions, check whether literal and figurative senses both fit.

A common wrong turn

A parts category can describe a family of designs rather than one object containing everything. Explain that boundary instead of implying all models are identical.

A worked comparison

#740 combines barrel, spring, tip, cap and ink chamber as pen parts. A retractable pen and a capped pen need not contain every component in exactly the same form.