The big question then becomes: “is that behaviour inherent to all systems like this, or just this one?” Like, if you go to the store, buy a basic sprinkler, and then test it and it behaves exactly opposite to how you might expect it to. Or it does something completely unexpected, like phases into another dimension and starts pumping strawberry jam. Your next step shouldn’t be to say “Oh, weird, I guess that’s that.” You’d start knocking down variables. Is it the same with every sprinkler or just this one? Does the amount of suction applied affect it? If I replace the water with something else does the outcome change?"
If you’re doing research like this, you’re kind of expected to do the same sort of elaboration even if the result of a basic experiment conforms precisely to your hypothesis, because the question isn’t if any given sprinkler setup behaves in this way, it’s about whether this is a universal phenomenon across all similar setups. Because there’s an xkcd for everything, it’s this.
I remember Dolly Parton singing about her.