system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why there doesnt seem to be a state between "liquid" and "frozen" for water, like "viscous" or "syrupy"

why does it seem to go from "liquid" to "frozen" instantly?
gpt
Other things which do have that transition zone of "syrupy" (e.g. syrup) are much more complex substances than water.  Inside them, there are many different types of molecules - hydrocarbons, sugars, fats, actual cells, etc. - which contribute to a gradually changing viscosity.  Water, however, is (for our purposes) just one, uniform molecule, so we see it melt and freeze at a specific temperature.

In chemistry, those other things which have a gradual viscosity change would be called something different - a solution, a suspension, or probably a combination with all the many different actual substances that make up that syrup, honey, molasses, etc.