Although not true, I give this a pass for being a Nirvana lyric.

> In very rare cases (nuclear fusion) the water is destroyed into its primitive elements

Simple electrolysis will split water molecules into hydrogen and oxygen.

Nuclear reactions will change the atoms, but you don’t have to go that far to break down water.

I’m sure it’s highly subjective. But if you want to go about it scientifically, you can survey a number of strangers to answer the question for you.

Now, where to find those strangers…