Unified physics theories may require multiple formulations.

Evidence

Instead, we may have to use different reflections of the underlying theory in different situations. — Hawking, Stephen, A Brief History of Time, 11

Categorization

• corroborated: 2 independent passages support this claim — Hawking, Stephen, A Brief History of Time, 11
• XREF: connects to: Without empirical refutation of either general relativity or quantum mechanics, it is the incommensurability between the theories that has most driven theoretical physics forward. — Capitalising on incommensurability – Integration and Implementation Insights; A compelling thesis should involve multiple layers of interpretive claims. — Tilar J Mazzeo, How to Write a Bestseller, 57; One reality supports many independent scientific viewpoints of it — Georg Simmel, on individuality and social forms_…, 207