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They’re clearly not “normal” if most fonts don’t have them (as default glyphs; many fonts have them as alternates).

By "normal" he means the glyph we are taught to write by hand, which is also the glyph young children are taught to identify individual letters.

Yes, my point was that that is a very narrow view of “normal”.

That's what context does, it narrows!

I personally write, and have seen many others use as well, the "two-storey" a and g, so I suspect there's regional variation.