Reminds me of the fact that for 500 years everyone graduating with a BA from Oxford had to swear that they would never agree to the reconciliation of Henry Symeonis, despite no one having any idea who he was for most of that time.
The origins of the Cagots remain uncertain . . . . Despite the varied and
often mythical explanations for their origins, the only consistent aspect of
the Cagots was their societal exclusion and the lack of any distinct physical
or cultural traits differentiating them from the general population.
0. https://en.wikipedia.org/wiki/Cagot