Revision history for entry McGee, Vann (1985). "A counterexample to modus ponens" [MCGACT] |
| Time | Type | Notes |
| 2011-03-24T15:59:30 | update | |
| 2011-03-20T01:42:34 | update | |
| 2010-08-20T08:31:21 | update | |
| 2009-06-16T16:14:38 | update | |
| 2009-06-16T16:08:02 | update | |
| 2009-06-16T15:51:47 | update | |
| 2009-06-16T15:31:19 | update |
