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When Clay Sings / Lists

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16 seconds ago ejeandel Added Higher recursion theory to the list.
41 seconds ago ejeandel Added Unsolvable classes of quantificational formulas to the list.
1 minute ago ejeandel Added Complexity, logic, and recursion theory to the list.
1 minute ago ejeandel Added Recursion theory to the list.
2 minutes ago ejeandel Added The decision problem to the list.