On 10/29/2018 8:06 PM, James Kass via Unicode wrote:
could be typed on old-style mechanical typewriters. Quintessential plain-text, that.
Nope. Typewriters were regularly used for underscoring and for strikethrough, both of which are *styling* of text, and not plain text. The mere fact that some visual aspect of graphic representation on a page of paper can be implemented via a mechanical typewriter does not, ipso facto, mean that particular feature is plain text. The fact that I could also implement superscripting and subscripting on a mechanical typewriter via turning the platen up and down half a line, also does not make *those* aspects of text styling plain text. either.
The same reasoning applies to handwriting, only more so. --Ken

