Talk:Fluid system
The category in Factorio that includes "water" and "oil" is best called Fluid, not "liquid". The words "liquid" and "gas" specifically describe types of matter: solid or liquid or gas (or plasma; see Wikipedia). "Fluid" is often used to mean "liquid", but technically is not the same type. It is anything that flows, and can be either a liquid or a gas.
I would rename the page, but there are a lot of subpages and language pages that use Liquid. I don't want to break everything.