“In my paper the fact the XY was not equal to YX was very disagreeable to me. I felt this was the only point of difficulty in the whole scheme...and I was not able to solve it.” WholeFactsAbleFeltEqualPaperLogicDifficultySolveCertaintyUncertaintyReasoningSchemesDisagreeableOntology Author:Werner Heisenberg
“Can quantum mechanics represent the fact that an electron finds itself approximately in a given place and that it moves approximately with a given velocity, and can we make these approximations so close that they do not cause experimental difficulties?” FactsMovingGivenCausesDifficultyPhysicsQuantumMechanicQuantum PhysicsQuantum MechanicsElectronsVelocityApproximation Book:Gesammelte Werke Source: Gesammelte Werke
“Quantum theory provides us with a striking illustration of the fact that we can fully understand a connection though we can only speak of it in images and parables.” FactsSpeakTheoryConnectionsQuantumIllustrationParablesQuantum Theory Book:Physics and Beyond: Encounters and Conversations Source: Physics and Beyond: Encounters and Conversations
“I think that modern physics has definitely decided in favor of Plato. In fact the smallest units of matter are not physical objects in the ordinary sense; they are forms, ideas which can be expressed unambiguously only in mathematical language.” ThinkingIdeasMatterFactsFormLanguageModernObjectsOrdinaryDecidedFavorsPhysicsMathematicalSmallestUnitsPlatoModern Physics Book:Natural law and the structure of matter Source: Natural law and the structure of matter
“[T]he atoms or elementary particles themselves are not real; they form a world of potentialities or possibilities rather than one of things or facts.” WorldRealFactsFormPossibilityPhysicsAtomsParticlesQuantum PhysicsQuantum Mechanics Author:Werner Heisenberg
