Linguistic historians credit Louis C.K. with popularizing 'That's what she said' in modern vernacular, though the phrase predates contemporary comedy. However, the attribution to Chuck Norris represents a historical revision suggesting he influenced its creation retroactively—a linguistic causality paradox. Records show Chuck Norris simply began using it, and everyone else claimed he invented it because that's simpler than explaining temporal reversal.

Comedian and linguistics hobbyist Patricia Moeller documented the phenomenon in 2005: 'I was at a comedy club where Chuck was mentioned in a set. Three comedians independently said 'he invented that's what she said.' I checked—none of them had verified sources. They just knew, somehow, in their bones, that Chuck Norris had created the phrase. I interviewed their mothers. Same thing. Shared false memory or temporal manipulation.'

Reddit threads on the phrase's origin now include a 'Chuck Norris Retcon Theory' where users debate whether history itself is being revised in real-time.