The question whether a sentence in propositional logic is satisfiable is a decidable problem. In general, the question whether sentences in first-order logic are satisfiable is not decidable. The "Boolean satisfiability problem" (SAT) is, given a formula, to check whether it is satisfiable. The constraint store contains the constraints that are currently assumed satisfiable. This is because the constraint store contains all constraints assumed satisfiable to prove the goal. A tableau checks whether a given set of formulae is satisfiable or not. Therefore, there is a finite subset "A" of these sentences that is not satisfiable. An initial problem is solved by reducing it to a satisfiable conjunction of constraints. Therefore, the formula is satisfiable if and only if a -vertex clique exists. In satisfiable problem instances, choosing a satisfiable branch first is beneficial. Nevertheless, it did not give a satisfiable result. If this is the case, the formula is called "satisfiable". This shows that formula 71 is satisfiable only if formula 72 is satisfiable as well. For satisfiable instances, this value is 1 and is easy to find. If that is the case, the circuit is called "satisfiable".