A predicate is tolerant if minor changes in an object's properties don't alter its applicability. The 'bald' predicate exemplifies tolerance;…
The tilde (~) is a logical operator representing negation. It signifies that the proposition it modifies is false. This fundamental…
Explore three-valued logic, which expands beyond traditional true/false to include a third truth value like 'unknown' or 'indeterminate'. This system…
A theorem is a statement proven true through logical deduction from accepted axioms and previously proven theorems. It forms a…
Term logic, central to Aristotelian thought, analyzes propositions by focusing on the relationships between terms and the inferences derived from…
Temporal modal logic extends modal logic with time-related modalities like 'always' and 'sometimes'. It enables reasoning about the temporal aspects…
The temperature paradox highlights how seemingly illogical conclusions, like 'ninety is rising,' can be valid within specific formal logical systems.…
A tautology is a statement or formula that is always true, regardless of the truth values of its components. It's…
Tarski's indefinability theorem proves that truth cannot be consistently defined within the same language it applies to. A meta-language is…
Alfred Tarski's Tarskian hierarchy is a linguistic structure designed to prevent semantic paradoxes. It organizes languages into levels, where higher…