A Thought Experiment.
” … It is typical of these cases that an indeterminacy originally restricted to the atomic domain becomes transformed into macroscopic indeterminacy, which can then be resolved by direct observation. That protects us from so naively accepting as valid a ‘blurred model’ for representing reality. In itself, it would not embody anything unclear or contradictory. There is a difference between a shaky or out-of-focus photograph and a snapshot of clouds and fog banks.”
Erwin Schrödinger, “Die gegenwärtige Situation in den Quantenmechanik (The present situation in quantum mechanics), Naturwissenschaften (translated by John D Trimmer in Proceedings of the American Philosophical Society) – (the “cat” Thought Experiment).