Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?

[Po Lu]

Richard Stallman <rms@gnu.org> writes:

>   > We don't have a way of determining whether a terminal can display
>   > ligatures.

> Could we do it via terminfo?  We can define any capabilities we like.

At the very least, it would require the cooperation of the terminal
emulators, because these days they typically don't declare what they are
(much less whether or not they support ligatures), instead masquerading
as `xterm'.