Introduction to Observe-Predict-Infer. It is mandatory for those who want to OPI the situations! To OPI a situation, you will need to enter a password. If I think you are ready to OPI a situation, I will display the password to you. You cannot comment the password anywhere! Oh, and no one can comment this project unless they have a good reason to! The music is Claude Debussy's "Golliwog's Cake-walk"
