Evidence Hub

Quantum Physics and the Identity of Indiscernibles: A Logical Analysis

Krause D

2026

Abstract

We consider the formulation of Leibniz’s Principle of the Identity of Indiscernibles (PII) in a second-order language. We argue that it cannot hold in quantum physics because the notion of identity it encompasses, namely the standard identity of classical logic, does not hold in this realm. We provide some insightful examples to support this view.

Read the paper

Related studies

Go deeper in Evidence Hub

Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.

Open this study Sign up free