Well, if the "world's smartest man" says it, that should be good enough proof for anyone. On, the other hand ... https://www.perplexity.ai/search/what-are-some-of-chris-langan-ptZmDOlnQja7y0NRCDCmjw
He refuses to take a WAIS. No way he's over 120. MvS is smart but tests have wild var depending on iterations of the same test. Feynman scored like a 130. So grain of salt here.