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If you had to create a modern 5 category exhaustive folksonomy of ALL materials, like the earth-fire-water-wind-ether of the alchemists, what would your 5 base classes be? Should cover all familiar modern materials.
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I thought of doing a straightforward material classification scheme, but it didn't seem worth it, so instead I enjoyed other people's creative reinterpretations.
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This is about right; I would substitute the broader “stone” for the narrower “concrete”… and I'm not sure where glass goes (you might need six categories)
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