“The less sure managers are of their opinions, the more vigorously they defend them.”

Source: 2000s, A little book of f-laws: 13 common sins of management, 2006, p. 8, bold text cited in: Gregory H. Watson (2010).
Context: The less sure managers are of their opinions, the more vigorously they defend them. Managers do not waste their time defending beliefs they hold strongly – they just assert them. Nor do they bother to refute what they strongly believe is false.

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Russell L. Ackoff 70
Scientist 1919–2009

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Original text: [...] si l'on y rencontre moins d'éclat qu'au sein d'une aristocratie, on y trouvera moins de misères; les jouissances y seront moins extrêmes, et le bien-être plus général; les sciences moins grandes, et l'ignorance plus rare; les sentiments moins énergiques, et les habitudes plus douces; on y remarquera plus de vices et moins de crimes.
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