A chemistry teacher asks, “Can anyone tell me what H₂O is?”
A student raises his hand: “Water!”
Teacher: “Correct! Now, what is H₂O₄?”
Student: “Drinking?”
Teacher: “…”
Student: “I failed chemistry, didn’t I?”
A chemistry teacher asks, “Can anyone tell me what H₂O is?”
A student raises his hand: “Water!”
Teacher: “Correct! Now, what is H₂O₄?”
Student: “Drinking?”
Teacher: “…”
Student: “I failed chemistry, didn’t I?”