For very good reasons I don't do my own major electrical work when it's needed in our house. I call on a qualified professional.
I don't have to stick a knife into a switched on toaster to prove electricity can kill [obviously some people do] and would argue strongly with anyone suggesting otherwise. If necessary I'll call on professional opinion [that's valid isn't it?] and in 99% of cases most people would take an Electrician's word on the subject !

Likewise, I don't need to be a mathematician to disagree with the original[IMHO] silly maths. proposition that was presented in this thread, but quite validly and if necessary, present professional opinion on the matter. If that's unfair or unacceptable then this discussion is clearly over.

If Reid's maths. are wrong, then there will be other Mathematicians out there who would have said so and presented their maths arguments to prove it. Sorry, I can't find even one that disagrees but plenty who agree.