A man belongs to a clan that says all its members are descended from a fabled king who lived ten thousand years ago and was the son of a mermaid. This is an example of descent.

stipulated

Explanation:

A man belongs to a clan that says all its members are descended from a fabled king who lived ten thousand years ago and was the son of a mermaid. This is an example of stipulated descent.

The term stipulated descent is used to describe any descent that is specific but however, cannot be traced.

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )