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Promoted posts image renders Hebrew ℵ as "?", but Greek "Α" correctly [closed]

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Closed as duplicate by manassehkatz‭ on Jun 8, 2021 at 14:25

This question has been addressed elsewhere. See: Community ad replaces characters with question marks

This question was closed; new answers can no longer be added. Users with the reopen privilege may vote to reopen this question if it has been improved or closed incorrectly.

In this case, an image really is worth a thousand words:

What sound did the letter ? encode in ancient Hebrew, and why did it morph into the greek vowel Α?

That links to the question What sound did the letter ℵ encode in ancient Hebrew, and why did it morph into the greek vowel Α?

The original image is at https://languages.codidact.com/ca/posts/281765.png

Notice that, in the image, "ℵ" U+2135 displays as a question mark, but "Α" (which really is a Greek uppercase alpha U+0391, not the visually similar Latin uppercase A U+0041) displays correctly.

I believe that this is a bug, and that ℵ should also render correctly in this case.

More generally, if we're going to go around replacing characters that for some reason can't be rendered in the image, it's probably better to use "�" U+FFFD for that purpose.

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