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@blog Not to forget confusing fonts. Fraktur, for example:

@blog I generally agree. Homographs do produce problems in science, though, even in articles written in 'English'. For instance β-carotene is not the same as the non-existing ß-carotene. (The latter, the sz ligature, can all too often be found in the scientific literature, where β is meant. Not a big problem for the human eye, but a big one for machine-readability.)