You are in a boat in a pool with a rock in your hand. You throw the rock into the pool. Does the water level rise, drop, or stay the same?
depends on how big the pool is and how accurately you can measure the water rise
you're already in the pool with the rock, so the water displaced is the same...this other guy is stupid
If the rock were neutrally buoyant the water level would remain the same. It is heavier than water which causes it to displace more than its own volume while in the boat compared to at the bottom of the lake. Therefore the water level of the lake would go down.
They asked a question that was somewhat confusing at the time but made a lot of sense later. They asked how I would deal with monitoring the work done by payroll administrators even as I was not their supervisor but was still responsible for the accuracy and quality of their work. Ironically, this question rang in my ears for a long time--it was definitely a dilemma.