Pointless Information

One day our professor was discussing a particularly complicated concept. A pre-med student rudely interrupted to ask:

- Why do we have to learn this pointless information

- To save lives - the professor responded quickly and continued the lecture.

A few minutes later, the same student spoke up again:

- So how does physics save lives? - he persisted.

- It keeps the ignoramuses like you out of medical school - replied the professor.