/**
  * @param KnowledgeBase $knowledgeBase
  *
  * @return WorkingMemory
  */
 public function run(KnowledgeBase $knowledgeBase)
 {
     $workingMemory = new WorkingMemory();
     $workingMemory->setFacts($knowledgeBase->getFacts());
     $this->inferenceProfiler && $this->inferenceProfiler->startInference($knowledgeBase->getFacts());
     while ($matchedRules = $this->getMatchedRules($knowledgeBase, $workingMemory)) {
         /** @var RuleRunDecorator $selectedRuleDecorator */
         $selectedRuleDecorator = $this->conflictResolutionStrategy->selectPreferredRule($matchedRules, $workingMemory);
         $this->ruleExecutor->execute($selectedRuleDecorator, $workingMemory);
     }
     $this->inferenceProfiler && $this->inferenceProfiler->endInference($knowledgeBase->getFacts());
     $knowledgeBase->setFacts($workingMemory->getAllFacts());
     return $workingMemory;
 }