- Boiling causes the volume of a liquid to decrease
- The water was boiled
- Water is a kind of liquid at room temperature
- Hence, the volume of water decreased

Therefore, the volume of water decreased
Q: A student measured the volume of water in a pan. The student boiled the water for thirty minutes and then measured the volume of the water again. The volume of water most likely
Context:
- Boiling causes the volume of a liquid to decrease 
- The water was boiled 
- Water is a kind of liquid at room temperature