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But these characters only look identical in some fonts. Are you saying that if you change font, some characters in a string should change appearance and others should not?

And what about the round-trip rule?

And ligatures? Aren't those a semantic distinction?



> But these characters only look identical in some fonts.

That's a problem with the fonts.

> And what about the round-trip rule?

Print Unicode on paper, then ocr it, and you'll get different Unicode. Oh, and normalization.

> ligatures

Generally an issue with rendering.

> semantic distinction

Unicode isn't about semantics (or shouldn't be). Consider 'a'. It's used for all kinds of meanings.




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