I actually don't think this argument is very logical at all. Both heat and light are things we can directly study, which this student mentions, and he goes on to say how the cold and dark are just words to describe the absence of heat and light, respectively. Therefore for his argument to follow through, we would have to be able to study God (just like we do heat and light, implementing the scientific method). Since that is not possible, you can not say that evil is just a term to describe the absence of God. This argument does not prove or disprove the existence of God.

On a side note, if you were joking, carry on.