Is Water a Natural Kind of Thing?

We think that water is annd tatit is a hat. That is the s pretheoretic water. We also believe that natural kinds of stuff are am essentially, i mean, i know a lot of this is controversial,. But it seems that enough people think that it's plausible that to determine the nature of a natural kind, like water or gold or lead or something like that, youl look at the internal composition. And then we find out that, oh yes, what it is is h two molecules. It becomes intelligible, but only against a background of other things that we believe. Now, and even if we had a demonstrative concept water, is thatd