Some subscribers to Math-Teach might be interested in a recent post "Fourteen Quotes in Praise of Ignorance #2" [Hake (2013)].  The abstract reads:

ABSTRACT:  Stimulated by Stuart Firestein's (2012) "Ignorance: How It Drives Science" at <http://bit.ly/15NqzM1>, in this post I list "Fourteen Quotes in Praise of Ignorance." These quotes are listed in alphabetical order of the first letter of the author's name: Cicero, Disraeli, Dyson, Feynman, Firestein (3), Laėrtius, Maxwell, de Montaigne, Pippard, Shelley, Wheeler, and Ziman.

[The present quote list is a sequel to: (a) "Eleven Quotes in Honor of Inertia" (Hake, 2006) at <http://bit.ly/1409kCn>], and (b) "Twenty-eight Quotes Relevant to Overpopulation" at the end of my post "L.A. Times Population Report: Beyond 7 Billion - Fighting the Last War?" (Hake, 2012) at  <http://bit.ly/TeOpJj>].
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To access the complete 15 kB post please click on <http://yhoo.it/15pF1ch>.

Richard Hake, Emeritus Professor of Physics, Indiana University
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REFERENCES [URL's shortened by <http://bit.ly/> and accessed on 28 July 2013.]
Hake, R.R. 2013. "Fourteen Quotes in Praise of Ignorance #2," online on the OPEN! Net-Gold archives at <http://yhoo.it/15pF1ch>. Post of 28 Jul 2013 13:55:09 -0700 to AERA-L and Net-Gold. The abstract and link to the complete post are being distributed to various discussion lists and are on my blog "Hake'sEdStuff" at <http://bit.ly/15eHCpp> with a provision for comment.