Many if not most questions posted here contain false presuppositions, and therefore can't be answered as stated. Generally one has to correct those before addressing the information that's actually needed; that's best done in a comment, rather than an official Answer. As for points, it's not worth worrying about them.
In any event, a topic like "English Grammar and Usage" does not lend itself to a simple Q/A format -- it appears that everybody has their own ideas about what terminology is correct and assumes it's universal, so they rarely give useful context, presuming there are Rules that cover everything.
Since nothing could be further from the truth, we end up with the usual mishmosh.