criteria： null exception criteria: 0 false criteria: 1 weight Don't care true others **answer.match(criterion.getAnswer()) true ! answer.match(criterion.getAnswer()) criterion.getWeight() == Weight.MustMatch false ! criterion.getWeight() == Weight.MustMatch false

criteria: 2 1) weight Don't care true 2) weight don't care true => true score + 2 ** 2) answer.match(criterion.getAnswer() => true score + 2 2) !answer.match(criterion.getAnswer() criterion.getWeight() == Weight.MustMatch false score score + 1

										!criterion.getWeight() == Weight.MustMatch true
										score + 1

		   others
		   		*** answer.match(criterion.getAnswer()) true  2) don't care true => true score +2
		   													** 2) answer.match(criterion.getAnswer()  true score +2
		   													2) !answer.match(criterion.getAnswer() 
		   														criterion.getWeight() == Weight.MustMatch false score + 1

		   														!criterion.getWeight() == Weight.MustMatch true score + 1

		   		! answer.match(criterion.getAnswer()) 
		   			criterion.getWeight() == Weight.MustMatch false

		   					2) don't care  true score + 1
		   					**2) answer.match(criterion.getAnswer()) true score + 1
		   					2) !answer.match(criterion.getAnswer()) 
		   							criterion.getWeight() == Weight.MustMatch false score + 1
		   							!criterion.getWeight() == Weight.MustMatch false score

		   			! criterion.getWeight() == Weight.MustMatch false
		   					2) dont care false score + 1
		   					**2) answer.match(criterion.getAnswer()) false score + 1
		   					2)!answer.match(criterion.getAnswer()) 
		   					    criterion.getWeight() == Weight.MustMatch false 
		   					    !criterion.getWeight() == Weight.MustMatch false