# Comment on Healey's "Quantum Theory and the Limits of Objectivity"

## TL;DR

This paper critically examines Healey's argument against objective physical outcomes, highlighting that the core correlation functions are experimentally inaccessible, thus questioning the argument's verifiability and its relation to prior proposals.

## Contribution

The paper identifies a fundamental flaw in Healey's argument by showing the inaccessibility of key correlation functions and discusses how modifications relate to previous proposals.

## Key findings

- Healey's gedankenexperiment relies on inaccessible correlation functions.
- The argument's verifiability is compromised due to experimental inaccessibility.
- Modified protocols align Healey's proposal with earlier similar ideas.

## Abstract

In this comment we critically review an argument against the existence of objective physical outcomes, recently proposed by R. Healey [Foundations of Physics, 48(11), 1568-1589]. We show that his gedankenexperiment, based on a combination of "Wigner's friend" scenarios and Bell's inequalities, suffers from the main criticism, that the computed correlation functions entering the Bell's inequality are in principle experimentally inaccessible, and hence the author's claim is not verifiable. We discuss perspectives for fixing that by adapting the proposed protocol and show that this, however, makes Healey's argument virtually equivalent to other previous, similar proposals that he explicitly criticises.