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Ms. Cartman is an A sexual hermaphrodite. She is his mother and father
In "200" and "201," it is discovered that during his time in a mental institution, Scott began to research Cartman's history in the hopes of exacting revenge upon him. During his research, Scott discovered that his own father Jack Tenorman had played right tackle for the Denver Broncos during his younger years, and that during the night of the Drunken Barn Dance, he had sex with Cartman's mother Liane resulting in her getting pregnant with Eric.