public string Visit(DisjunctionFormula disjunctionFormula) { return($"({disjunctionFormula.LeftSubformula.Apply(this)} ∨ {disjunctionFormula.RightSubformula.Apply(this)})"); }
internal DisjunctionTableau(DisjunctionFormula formula, TruthLabel truthLabel) { Formula = Disjunction = formula; TruthLabel = truthLabel; }