My law school classmates know that I’m not one to throw around a highly-technical term like “proof” willy-nilly. And I certainly would never use a phrase like “beyond a reasonable doubt” without good reason.
So, when I say that the Aleppo Codex is “proof beyond a reasonable doubt” that Karaites are awesome, I mean it in the most legalistic way possible. But you don’t have to take my word for it. In fact, as a Karaite, I have to tell you not to rely on my opinion.