Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Special pleading:

This text is part of the article's lead section, so referencing it may be optional. Please see WP:CITELEAD for more information.

"

In medieval philosophy, it was not presumed that wherever a distinction is claimed, a relevant basis for the distinction should exist and be substantiated. Special pleading subverts a presumption of existential import.[citation needed]