Before a word or a sentence, it marks that the word or sentence is incorrect
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Before a word or a sentence, it marks that the correctness and/or acceptability of that word or sentence is dubious or poses problems of some kind.
Caution! The word or sentence may be abusive or at least not politically
correct
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internal link to other pages
marks a connection of some kind between the preceding word(s) or sentence(s) and and what follows; the type of connection or relationship depends on the