Further Reading:
V1, from back a ways: The Square of Opposition
https://leonardi.logicalgeometry.org/
A database of Aristotelian and logic diagrams including many recent ones:
https://leonardi.logicalgeometry.org/diagrams
Thanks for the nudge to do this V2 : https://www.etsy.com/listing/1124346541/square-of-opposition-sticker-classical
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