this post was submitted on 24 Jul 2023
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A character is nothing without a font though. When you look at a character on-screen, it's being rendered in a specific font. Typing that Unicode character in "Special Alphabets 4" produces the image in question.
The character (𝕏) doesn’t actually doesn’t exist in the font, because supporting arbitrary Unicode characters in every font would be absurd. Paste it into the font preview and it renders a black square.
There are fonts that support every unicode character though. https://en.wikipedia.org/wiki/Noto_fonts supports up to Unicode 13. How do you think phones display every single unicode character in a text message?
Of course there are fonts that support every character, the characters themselves would be useless if they couldn’t be rendered by anything. I’m only saying that this specific font doesn’t support the character.
Oh, I see, I misread. That's interesting. So it looks like it's typically just a glyph.