Decision at the beam-splitter, or decision at detection, that is the question

TL;DR

This paper argues that the nonlocal decision of outcomes at detection in quantum mechanics rules out alternative theories, emphasizing that all observable content must be accessible within space-time.

Contribution

It presents a philosophical argument that nonlocal decision at detection is incompatible with any alternative to quantum mechanics.

Findings

Nonlocal decision at detection excludes alternative theories.

All observable content must be accessible within space-time.

Supports the completeness of quantum mechanics.

Abstract

I argue that nonlocal decision of the outcomes at detection excludes any alternative theory to quantum mechanics: Not all that matters for the results of physical experiments is content in space-time, but all that is in space-time is accessible to observation.