#  studies have been based 

By [Untitled](https://paragraph.com/@0x50512742ec4b69849ea027c2f6580ce54e92a793) · 2021-12-08

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introduce some concepts

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*Originally published on [Untitled](https://paragraph.com/@0x50512742ec4b69849ea027c2f6580ce54e92a793/studies-have-been-based)*