This is one of the age old philosophical questions, if you pooped and there was no poop - Did you actually poop?
A question that stumped philosophers until the late 1900s and the invention of the water closet and scientists accidentally discovered the ghost poop - You know you pooped but there's nothing in the bowl!
The quantum state of having pooped and not having pooped can be superimposed even in a simple 4D universe like ours and in the end it's just like the observer effect (double slit experiment):
If you have any other questions feel free to ask, I have been called an expert shitposter by people with vast experience in the field.