QBF (Quantified Boolean Formula)

A QBF, or Quantified Boolean Formula, is a logical statement involving variables that can be either true or false, with quantifiers like "for all" (denoted as ∀) and "there exists" (denoted as ∃). It extends regular Boolean formulas by specifying whether a variable must hold true for every possible case or if there’s at least one case where it holds true. Think of it as a formal way to express complex conditions and questions, such as “Is there a way to assign true/false values to variables so that a certain logical condition always or sometimes holds?”