This limitation was first elucidated by Heisenberg through a thought experiment, and is represented mathematically in the new formalism by the non commutativity of operators representing quantum observables.

He entered a plea for the urgent necessity of an entity called applied art and emboldened us to look triumphalist Formalism in the face and demand to see its passport.

The term 'Copenhagen interpretation' suggests something more than just a spirit, such as some definite set of rules for interpreting the mathematical formalism of quantum mechanics, presumably dating back to the 1920s.

This stance appears to be closely aligned with Xi s rather cryptic recent comments about a mass line education campaign aimed at addressing problems arising from the four winds of formalism, bureaucracy, hedonism, and extravagance.

Then, the story doesn't stop here, because for a very long time, for twenty odd years, many theoretical physicists have been trying to figure out a theoretical framework to climb over that Planck's wall, that is to say building some formalism, or new concepts in physics, that would enable us to describe gravitation, electromagnetic and nuclear forces as a whole.