What is a cultural binary?

It's a term used in my history class. The professor used it during the lecture. And textbooks aren't required for the course. I tried looking up the term on Google and other search engines, but I just found that binary means composing of two parts. I'm asking for a clear educational definition. Thanks! :) show more It's a term used in my history class. The professor used it during the lecture. And textbooks aren't required for the course. I tried looking up the term on Google and other search engines, but I just found that binary means composing of two parts. I'm asking for a clear educational definition. Thanks! :)
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