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Why can't I add the origins tag to my question? Is it because I already used an edit to add history-of?
Is Tomboy of Sterling Comics, from 1954, the first independent comicbook superheroine?
The tag origins is a synonym for history-of. So if you tag a question with origins it will be automatically converted to history-of.
If you view the page for questions tagged history-of and click on the synonyms link it tells you that "origins" is a synonym.