Simple

Seven Truths That Can't Coexist in the Quantum World express

Original: "A Heptalemma for Quantum Mechanics"
· John B. DeBrota, Christian List
Seven natural assumptions about reality cannot all be true at the same time in quantum mechanics.
Abstract

Quantum mechanics poses a riddle: seven simple statements about reality don't work together, but any six do. You have to choose which one to let go — like a group where one always ends up being the odd one out. This helps classify all interpretations of quantum theory in a fresh way. Maybe this principle applies to other scientific fields too?

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We are used to thinking that events have causes, objects exist independently, and signals cannot outpace the speed of light. Quantum mechanics, which describes the Standard Model of particles, challenges all these assumptions at once — as if a recipe couldn't use all seven ingredients.

Scientists have named this impossibility a heptalemma (a seven-sided dilemma). Any six statements coexist with quantum experiments, but the seventh is always superfluous. Rejecting a specific thesis determines which picture of the quantum world we adopt.

The roots of this choice lie in the debates between Albert Einstein and Niels Bohr, who puzzled over which ingredient to toss from the recipe of reality.

The heptalemma becomes a culinary test: if a physical system obeys all seven conditions, it is classical, akin to spacetime curvature in Einstein's theory. Violating any point transports us to the quantum kitchen. Six ingredients are enough to bake all of classical physics — from falling apples to the motion of galaxies.

🎯 Six of the seven statements fully describe all of classical physics — from the falling apple to the rotation of galaxies. The seventh ingredient always turns out to be redundant.

🎬 A universe where all seven theses held would be classical and empty — without stars, atoms, or life.

Scientists
Christian DopplerD. B. McLaughlinDidier QuelozMichel MayorR. A. RossiterAlbert Einstein
Tags
Standard Model speed of light spacetime curvature
Laws
Doppler effectprinciple of constancy of the speed of lightNoether's theoremmass–energy equivalenceMaxwell's equationsLorentz transformations
Original: arXiv:2512.01982 · CC BY · bridge42worlds