split between classical and quantum is shifty

Categories: Comparisons

An example of a metaphor used is discussing science:

"…a quantum-mechanical description is always relative to the particular user of of quantum mechanics who provides that description. Replacing that user with an apparatus introduces the notoriously ill-defined 'shifty split' of the world into quantum and classical, that John Bell so elegantly and correctly deplored.

Bell's split is shifty in two respects. Its character is not fixed. It can be the Landau-Lifshitz split between 'classical' and 'quantum'. But sometimes it is a split between 'macroscopic and microscopic'. Or between 'irreversible' and 'reversible'. The split is also shifty because its location can freely be moved along the path between whatever poles have been used to characterise it."

Mermin, N. David (2017) Why QBism is not the Copenhagen interpretation and what John Bell might have thought of it, in, Neils Bohr and the Philosophy of Physics. Twenty-first-century perspectives (Jan Faye & Henry J. Folse, eds.) Bloomsbury Academic: London, pp.367-377.

Author: Keith

Former school and college science teacher, teacher educator, research supervisor, and research methods lecturer. Emeritus Professor of Science Education at the University of Cambridge.