A teacher asks a student a question. Teacher: If I give you two cats, then two more cats, and then another two cats, how many cats do you have? Student: Seven. Teacher: Listen carefully. If I give you two cats, then two more cats, and then another two cats, how many cats do you have? Student: Seven. Teacher: Okay, how about I put it this way. If I give you two apples, then two more apples, and then another two apples, how many apples do you have? Student: Six. Teacher: Good, you get it! So if I give you two cats, then two more cats, and then another two cats, how many cats do you have?? Student: Seven. Teacher: Why the heck seven?? Student: Because I already have a cat!