Probability and Murphy's Laws

Sample Space:
Students from medical imaging class

Event:
Professor calling the random names picked from a glass, and asks the student questions. (He does not know your name if you haven't been called earlier.)

Observations:
1. The probability of getting called given that your mental state tends to "sleepy" is equal to 1.
2. The probability of getting called given that you are wide awake is equal to 0.

Conclusions:
Murphy's laws rule the earth!!!