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Timeline for Deficiency of necessary conditions

Current License: CC BY-SA 2.5

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when toggle format what by license comment
Feb 21, 2010 at 23:20 comment added Hans-Peter Stricker +1, for I found this a very valuable - because concrete - hint.
Feb 20, 2010 at 23:03 history answered Douglas S. Stones CC BY-SA 2.5