If a person weighs X pounds/kilos/whatever, how much of that weight is in terms of liquids (water, blood, urine, etc.) as compared to solids?
Anybody? Bueller? Bueller?
Here is a link to the last time this was discussed. There have been several others, but I’ll leave it to you to do your own search.
It’s a state of matter that’s not precisely liquid or solid, technically described as “gooshy”.