Rigid designators

Rigid designators are terms in philosophy and logic that refer to the same specific entity across all possible scenarios or worlds. For example, the name "Albert Einstein" designates the same person whether we imagine different worlds or situations. Unlike descriptions that might change in different contexts, rigid designators consistently point to the same individual or object, providing clarity and stability in discussions about identity, possibility, and necessity. This concept helps distinguish between names that are fixed identifiers and descriptions that may vary or be context-dependent.