Revision history of "Toothbrush Problem"

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  • (cur | prev) 17:19, 3 May 2009‎ Koedinger (talk | contribs)‎ . . (424 bytes) (+424)‎ . . (New page: Apparently it was first said about theories in Psychology, but it applies as well in learning sciences: "Theories are like toothbrushes. Everyone has their own and no one wants to use anyo...)
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