This version is out of date with respect to the latest symbolic constraints in miniKanren. See 'https://github.com/webyrd/miniKanren-with-symbolic-constraints' for a more recent version.
Copyright (C) 2012 Daniel P. Friedman, Oleg Kiselyov, Abdulaziz Ghuloum, William E. Byrd
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Will's old personal version of miniKanren, since he can never find the version he wants. Includes disequality constraints and Aziz's trie-based susbtitutions. [Or at least, will use the trie code once Will integrates the files! (which never happened...)]