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Solutions

A short course on the material that sits awkwardly between substance and mixture, and on why the awkwardness earns it a class of its own. Solutions are common, and they are easy to misread as something simpler than they are.

13 sections
CK admin

The sections below are arranged in the order we suggest, and the highlighted one is where we recommend you begin. But learning is not linear. Open any section in any order, return to earlier ones whenever you like, and treat the sequence as a recommendation rather than a track.