Revision history for entry McGee, Vann (1985). "A counterexample to modus ponens" [MCGACT]

NB: for privacy reasons, few details are provided in public revision histories.
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2013-10-31T00:33:04updateSystem / admin update -
2011-03-24T11:59:30update
2011-03-19T21:42:34update
2010-08-20T03:31:21update
2009-06-16T11:14:38update
2009-06-16T11:08:02update
2009-06-16T10:51:47update
2009-06-16T10:31:19update