It seems necessary, again, to illustrate one of Dylan's experiments in physics.

Daddy often pulls Dylan on a scooter, by a belt connected to the handle bars. One day, Dylan decided that he should pull himself on the scooter, even while standing on it.

You and I know this doesn't work. Unfortunately, however, Dylan conducted the experiment on a slight downhill grade. To him, it seemed to work fine.

This illustrates how a scientific theory can never be proven, only disproven.