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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2013-10-31T04:33:04updateSystem / admin update -
2011-03-24T15:59:30update
2011-03-20T01:42:34update
2010-08-20T08:31:21update
2009-06-16T16:14:38update
2009-06-16T16:08:02update
2009-06-16T15:51:47update
2009-06-16T15:31:19update