Whenever one attempts to include the gravitational force in our models of quantized elementary particles, a spooky kind of non-locality appears to emerge. In superstring approaches, non-locality comes in the form of the holographic principle, which reduces the number of space-time dimensions. In contrast, the only tested particle theory, the Standard Model, is perfectly local. Different from the Standard Model, Quantum Gravity suggests that physically independent degrees of freedom are denumerable. To get a better intuitive picture of what is going in, it is suggested to reconsider the very foundations of quantum theory. Attempts to understand quantum mechanics in terms of some deterministic underlying theory also seem to require some spooky non-locality. We claim that these two problems are related; they may eliminate each other. Quantum mechanics appears to allow for an interpretation in terms of a local, deterministic model, but only if the gravitational force is included.
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