Boolean Algebra: Everyone will now about the situation once Jay starts gossiping. Leon is upset because everyone knows about the situation. Since Leon is upset, May is unhappy. Therefore, May is unhappy when Jay starts gossiping. I attached my working and I said it was invalid as line 15 was false. However, the argument is vaild. I have done this thrice and I still get line 15 false. Perhaps there is something in my working?