"The answer is not that everything worth saying can be translated into the technical vocabulary of physics; not even that all good science can be translated into that vocabulary. The answer is rather this: nothing happens in the world, not the flutter of an eyelid, not the flicker of a thougt without some redistribution of microphyscial states." S. 98.

"there is no mental difference without a physical difference. [...] It is a way of saying that the fundamental objects are physical objects. " S. 163.

Willard Van Orman Quine. Theories and Things. Cambridge 1981. Zit. in Nitsch 2012, S. 28.