Hi, I am Michael Zhang. In this week's study, I learned something about logic. Such as implication, converse, and contrapositive. Learning how to prove or falsify a statement is interesting. However, I find it's hard to make our logic both tight and concise. In addition, I find piazza is a good website for us to discuss questions and solve problems. I think I did okay in the tutorial quiz, for the reason that I did some practice before the quiz.