I would say „I made this gadget with my 3d printer, but the designer is someone else (I found the model online)“. The intent, the drive, the action comes from the human

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traes 5 hours ago | parent [-]

"I made this proof myself, but the designer is someone else" is an extremely unconvincing claim to ownership.

	▲	dgellow 4 hours ago \| parent [-]
		Almost as if a proof isn’t the same as a 3d print. It’s just not a good analogy