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Nonetheless, generally, within an uncontracted environment the only thing that needs grade 1 mode is lowercase letters a-j that follow unspaced after a number (because otherwise such letters read as digits; e.g., 123 #abc versus 12c #ab;c). Without contractions (i.e., in an uncontracted environment), other symbols cannot be misread (because they can't be read as contractions since none are used anywhere).
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