"Ken Blake" wrote

| Except that of those, only * is plain text.
|
|
| No, they are all plain text. The ° and · are not characters on the
| keyboard, but they can be easily gotten with alt-248 and alt-249.
|

You're getting into a can of worms there. * is
ASCII, which is also ANSI and UTF-8. Once you
get beyond Chr 127 you're getting into ANSI text,
which will be rendered according to the local
codepage. If it's being rendered as UTF-8 then
you'll just get corruption.

So in practice he's right. They might all be
plain text but in practice only ASCII is dependable
as plain text.