Self-reference occurs when something points back to itself. This concept is crucial in understanding paradoxes, the nature of logic, and…
Provability logic, a subset of modal logic, explores the formal properties of provability. It uses modal operators to express concepts…
An inner model is a substructure of a larger model of set theory. It's a fundamental concept for understanding the…
The property of a logical or mathematical system where not all true statements can be proven within the system's own…
A Henkin sentence is a self-referential statement that asserts its own provability within a formal system. It's a foundational concept…