@Dan This interpretation doesn't explain why the pasuk "walked" occurs before the mention of the revelation. It didn't take a revelation for Noach's belief. So we've concluded that Abraham and Noach are neither Jew nor Gentile. They're monotheists. Funny, that the definition of someone who is not a Jew is a gentile, which ostensibly includes anyone before the establishment of that term. Nor do I think Noach and Abraham can be distinguished by any other term than monotheist, regardless of their different methods of practice or faith as you presented.

@Dan The pasuk "Noach walked with G-d" is proof he followed G-d's ways prior to any prophetic revelation. Rambam points out this refers to conduct. chabad.org/parshah/article_cdo/aid/757296/jewish/…

@Dan The very fact that the Noahide laws derive that title show Noach is a gentile inner.org/nonjews/kabbalah-for-nations-introduction.php. I am not talking about the differences in monotheistic practice between Noah and Abraham, or between the two men themselves, but rather, how one is typically regarded as "righteous gentile," and someone like Abraham is not. If Abraham isn't a Jew, as you say, then what is he? Monotheistic practicer? Are both he and Noach then just monotheistic practicers?

@Dan So what then is the distinction between a monotheistic follower such as Noach and Abraham? One is distinctly noted as a gentile, the other not.

@Shemmy We can only assume.

@Shemmy For a list of all exceptions, see ou.org/torah/tt/5762/shavuot62/dav.htm

@Shemmy Apparently from what I've quoted there are 7 exceptions in Tanakh. This question was really about the why, and while there is this mnemonic and rule, there isn't a real basis or rationale for it. If you look at the jewish america link, there is a discussion of why Mem acts as it does, as it's part of the preposition Min. That's closer to an origin, and the original question.

@Shemmy That was an interesting argument, but discussion showed the kammatz /patach confusion showed it couldn't be related to proper nouns.

Dipthong and Example - Please note the chireq which explains syllabification @Double AA. I think in the end pronunciation varies greatly.

I apologize, I shouldn't assume anything about anyone.I am deeply sorry. I think looking at your rendering, we might be forgetting that the vowel shuruk can be written with an Aleph.