Quantum indeterminacy says that without interaction/ measurement the actual state of a particle is not determined.

Gravitation on the other - by measurement and theory - reaches indefinitely far out. Meaning it interacts with particles. But how can it do that if particles are not determined, which we also know from experiment).

Those two observations are both measured by experiment, but actually are exclusive of each other. Gravitaiton between two particles is depending on the positions of both. If they are not determined, gravitaition would not be determined. Yet it is, it dictates large parts of our universe.

Conversly, if gravitation acts deterministically, e.g. of a planet on a particle, why is it not determined?

Apparently very weak gravitational forces (as between two particles, or between a planet and a particle) are not enough to make the situation "deterministic", which is not represented in any formulation for gravitation, despite the apparent contradiction between observation of gravitational effects and quantum indeterminacy.

What am I overlooking? Both cannot be true, due to that contradiction.

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