to one of the most comprehensive books in the world
on Methodology for Creating Business Knowledge

by Ingeman Arbnor & Björn Bjerke

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Arbnor Uncertainty Principle

Arbnor/Bjerke Principle of Complementarity

"The more precisely you determine isolated characteristics of a human being and her activities, quantitatively and statistically, the less you understand of her as a whole. And the better you understand her as a whole, the more uncertain the quantitative/statistic aspects become."

"The potential interdependency in opposite methodological opinions of similar problems is to be used for excellent explanations and/or understanding of them. The principle implies that there are many such problems with this kind of inherent interdependency. Therefore, it is possible and desirable to use the Arbnor/Bjerke methodology of complementarity in studies faced with multifaced problems."