Optimist: The cup is half full

Pessimist: The cup is half empty

Developer: Why is the cup not filled to the top now? I didn't check in any code - did someone else change my cup?

Or better yet "don't touch that cup - it's a legacy cup. Things will break if you change it"
@JenMsft the cup is full, it’s 50% liquid and 50% air. Yes this broke my high school physics teacher.
@JenMsft Developer: cup was filled up on my machine.