So, if that P of F exam mentioned by OzExpat, is a verbal one - administered by an examiner who may decide on the future of your position in the aviation industry - then I would think it quite important to be able to give him/her the answer that he/she wants...
In which case, %MAC, MasterGreen, Checkboard, bookworm and OzExpat - it certainly does matter.
If the point that you're making is that examiners sometimes don't have a full grasp of the physics behind the questions they ask and that you sometimes have to learn an 'official' simple answer to a much more complex question, then perhaps I'd agree with you. But if that's the case here, your question is mis-titled: you mean "for examiners only", not "for experts only".
Most of the good examiners I've met (most of them) are not so insecure about their ability in physics as to be frightened by a little debate about a complex issue.