Think about it - if it really worked you have invented a perpetual motion machine, since you could just feed the fresh water through a little water wheel back into the ocean.
You don't need to do any maths at all to know that his maths has gone drastically wrong somewhere.
Saying “maths” instead of just math sounds quite odd, why are you making it plural? Is solving one equation “a math” and solving multiple equations “maths”?
The Anglo-American linguistic divide is always fun to examine. We don't always come out ahead, but now and then we get winner like "acclimate."
If you don't like something coming between "mathematics" and "are", how about "I can prove Fermat's Last Theorem, but the mathematics are pretty high level." One could argue that many people would say "the math is pretty high level", but I think I've heard each before. It doesn't feel odd to write at all.
Maybe a single mathematic would be a single concept/subject, like arithmetic or algebra?
The four mathematics are arithmetic, geometry, music, and astronomy.
> So, get off your ath, let's do some math.
Still a minority in people right?
The sun isn't what causes pressure in the ocean...
> maths
That's what it's called in the UK (and maybe Australia & NZ). Shortening of mathematics. I could say the same about "legos". :)
It may be wrong but it really isn't "obviously delusional."