The successor function, denoted S(n) = n + 1, is a foundational concept in arithmetic and logic, defining the next…
A subtheory is a specialized theory nested within a broader one. It shares some axioms and theorems but focuses on…
A substitutional quantifier ranges over expressions or names, not objects. It's crucial in theories of reference and meaning, offering a…
A substitution instance is the result of replacing variables in a well-formed formula with other formulas. Each variable must be…
Substitution is the fundamental act of replacing variables or expressions in logical formulas with others. It's crucial for maintaining logical…
A subordinate connective is a logical operator appearing within the scope of another logical operator in a compound proposition. It…
Explore hypothetical situations and their consequences with subjunctive conditionals. These statements describe what would be true if a contrary-to-fact antecedent…
The subject term is the element in a categorical proposition about which something is stated. It forms the first part…
A subformula is a constituent part of a larger logical formula, sharing its own well-formed structure. Understanding subformulas is crucial…
Subcontrary statements share a unique logical relationship where they can both be true but never both false simultaneously. Explore this…