I never said that Flow and Typescript are "equally" not JavaScript. I think you are getting your arguments crossed here.
Though I will state that both are not JavaScript, even if they are "unequally" not JS (for whatever that distinction means to you, though I think it is a moot point). Flow when used purely as comments is JS, sure, but the type annotation syntax is not JS as defined by any ES standard (except maybe ES4) nor any JS accepted by browsers (definitely not ES4). "Strictly additive" isn't a distinction that matters to what constitutes a language, if we want to be pedantic.
Finally, I would suggest you refrain from the word "disingenuous". Yes, my opinions differ from your own, but you cannot speak to the candor of my opinions here. I am hoping you did not intend an ad hominem attack, but I don't think a lot of people realize how much "disingenuous" is an ad hominem attack.
Though I will state that both are not JavaScript, even if they are "unequally" not JS (for whatever that distinction means to you, though I think it is a moot point). Flow when used purely as comments is JS, sure, but the type annotation syntax is not JS as defined by any ES standard (except maybe ES4) nor any JS accepted by browsers (definitely not ES4). "Strictly additive" isn't a distinction that matters to what constitutes a language, if we want to be pedantic.
Finally, I would suggest you refrain from the word "disingenuous". Yes, my opinions differ from your own, but you cannot speak to the candor of my opinions here. I am hoping you did not intend an ad hominem attack, but I don't think a lot of people realize how much "disingenuous" is an ad hominem attack.