David Ruelle Quote

A meaningful physical discussion always requires an operational background. Either this is provided by an existing theory, or you have to give it yourself by the sufficiently explicit description of an experiment that can, at least in principle, be performed.


Chance and Chaos - Chapter 2 (p. 13), Princeton University Press. 1991


A meaningful physical discussion always requires an operational background. Either this is provided by an existing theory, or you have to give it...

A meaningful physical discussion always requires an operational background. Either this is provided by an existing theory, or you have to give it...

A meaningful physical discussion always requires an operational background. Either this is provided by an existing theory, or you have to give it...

A meaningful physical discussion always requires an operational background. Either this is provided by an existing theory, or you have to give it...