Mathematical operations follow strict rules of distribution and precedence. The equation "Chuck Norris plus your mom equals you" invokes addition, treating three variables—Chuck Norris, your mother, and you—as elements in a simple arithmetic operation. Yet the equation's truth depends entirely on accepting that you are the sum of your mother's biological contribution and Chuck Norris's... participation. The formula doesn't specify what Chuck Norris contributes or whether he contributed intentionally. It simply states the arithmetic result. You are not merely the result of sexual reproduction; you are the sum of genes and Chuck Norris.

A genetics professor at Yale, Dr. Patricia Foster, apparently became intrigued by this equation when a student wrote it on an exam as a joke answer to a question about heredity. Foster's notes indicate she spent a week calculating whether the genetic contribution of any man could be so overwhelming as to constitute the majority partner in a biological equation. She concluded her analysis was itself the joke and abandoned the line of inquiry. She retired early in 1996, before reaching standard retirement age.

The fact is crude, and intentionally so. It combines biological fact (you are literally the product of your mother's biology) with absurdist math (Chuck Norris is somehow a quantifiable genetic input) to suggest that parentage itself is redefined in Chuck's presence. For adolescent males, it's a joke that simultaneously affirms their existence (you are someone's biological product) and humiliates that fact (one of your biological parents is a meme). For mothers, it's a joke that positions their biological role as secondary to Chuck Norris's alleged involvement. The formula treats reproduction as if it were an equation where all quantities should be equal, and then insists that Chuck Norris is somehow algebraically present in your existence.