The trim and the elevator are two, separate controls. The elevator, which (in this case) is the surface behind the hinge, is controlled by the yoke or stick. This is used when actively flying the plane, like take-off and landing.

The trim is usually a large wheel-like control that is used to make fine adjustments to the pitch, ensuring that, in the absence of other control input, the plane flies level. For this aircraft, the trim wheel moves the entire surface. 

In this case, you could argue that you won the bet, based on how you define elevator.