“Over time, every way of thinking generates important problems that it cannot solve.”
Source: 1990s, Re-Creating the Corporation (1999), p. 3. Opening sentence.
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Russell L. Ackoff 70
Scientist 1919–2009Related quotes

As quoted by Donald Rumsfeld in "Sharon's Victory" (link is to a preview, but the quote is in the first few visible lines) https://www.wsj.com/articles/SB981508176687515426, Wall Street Journal (7 February 2001)

“What I cannot create, I do not understand.Know how to solve every problem that has been solved.”
on his blackboard at the time of death in February 1988; from a photo in the Caltech archives http://archives.caltech.edu/pictures/1.10-29.jpg

Aumann in: " Game theorists share Nobel prize http://news.bbc.co.uk/2/hi/business/4326732.stm" bbc.co.uk. Monday, 10 October 2005

Stopped in Our Tracks, Book Two: Excerpts from U.G.'s Dialogues (2005) by K. Chandrasekhar

“If you cannot solve the proposed problem, try to solve first a simpler related problem.”
Mathematical Methods in Science (1977), p.164

“If a problem cannot be solved, enlarge it.”
As quoted in Baseball's Greatest Quotes (1992) by Paul Dickson; cited in "Game Day in the Majors" at the Library of Congress http://memory.loc.gov/ammem/collections/robinson/jrgmday.html
“We cannot solve life's problems except by solving them.”
Source: The Road Less Traveled: A New Psychology of Love, Traditional Values, and Spiritual Growth

“We cannot solve our problems with the same thinking we used when we created them.”