Perhaps because the poster seems to be historian and not a CS practioner. From the question "Why I am asking I am writing a history of the Fast Inverse Squar

Perhaps because the poster seems to be historian and not a CS practioner. From the question "Why I am asking I am writing a history of the Fast Inverse Square Root, information about which is collected at 0x5f37642f.com. Part of investigating this as a historian means asking questions like this from the community. I do not have the expertise to distill, by myself, much of this because I am not a mathematician or a computer scientist."