Teacher: "What is an OS? And give me an example."
Student: "An OS is a word which can be used instead of saying 'Oh Yes'. For example, do you like ice cream? You can reply, ‘Oh, yes' or 'OS.'
Teacher: "You may sit down now."
John wished his classmate Julia, "All the best on your exams."
Julia replied, "Thank you and all the best to you too!"
Later Julia passed and John failed.
John came to the only possible and logical conclusion he could... "That only boys wish with a true heart."