An old friend comes to visit.

[Moonliner]

Originally Posted by Ghoulish Delight

Huh? Somehow I doubt the person who first described the ACTUAL Heisenberg Uncertainty Principle ever confused it with the observe effect.

Heisenberg himself may have initially offered explanations which suggested this view ... Heisenberg's original argument used the 'old' quantum theory (namely, the Einstein-deBroglie relations) and provided a heuristic argument that the position and momentum observables were not simultaneously observable with infinite precision. The more modern uncertainty relations deal with independent measurements being done on an ensemble of systems.