Your are on the top floor of a building. In the room are three switches, all are off. It is given that one of the switches controls the light in the basement; however, there is no way to determine from the top floor which switch is driving the light. Is it possible just by toggling the switches as you see fit to then travel down to the basement and observe without a doubt which switch controls the light?

Yes, it is, and without any form of tricky answer (ie rewiring the switch boxes, I look down the stairs, etc).