Here's a reference to an even older citation, which I can't now check: "[George] Box used it as a heading in a book chapter in 1979. Here is = the citation: Box, G.E.P., Robustness in the strategy of scientific model building, in Robustness in Statistics, R.L. Launer and G.N. Wilkinson, Editors. 1979, Academic Press: New York." -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] = On Behalf Of Zabinski, Patrick J. Sent: Thursday, March 30, 2006 2:36 PM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Re: DesignCon quote I found a slightly different citation on WikiQuote, which suggests = George Box and Norman Draper had two phrasings in their book Empirical Model-Building and Response Surfaces (Wiley 1987): "Remember that all models are wrong; the practical question is how=20 wrong do they have to be to not be useful." "Essentially, all models are wrong, but some are useful." I don't have a copy of this book to confirm the citation, but it seems = like most folks cite Box as the originator of the quote in this general = timeframe (late-80's). Wherever it came from, I like it... Pat ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu