Forum:CT Archive/Rearranging Category:Substances

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I get confused about how to classify things in the Category:Substances. There's Category:Alloys, Category:Metals, Category:Ores, Category:Rocks, Category:Minerals. But what's duracrete or stresscrete? If the only mention of a substance is that a wall is built of it, does that make it a metal? How do we know which metals are alloys and which aren't? The books aren't likely to say. I'd like to propose a bit of a simplifier. Eliminate Alloys, Metals, Minerals, Rocks, and Ores, and simplify it to two basic categories: Category:Ores, minerals and raw materials and Category:Metals, ceramics and refined materials. Anything that comes out of the ground or scooped out of asteroids goes in the first, and anything that comes out of a factory in the second. The second category could also include the various concrete-like building materials and plastics. Enochf 18:34, 19 January 2007 (UTC)

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 * 1) I'm a geek and I care about these things Enochf 18:34, 19 January 2007 (UTC)