How would I know if anyone has free will or not? When I rationalize my poop scooping duties by juxtaposing them with the duties of parents and dog owners, I en

How would I know if anyone has free will or not? When I rationalize my poop scooping duties by juxtaposing them with the duties of parents and dog owners, I end up placing the babies, dogs, and adult poopers in the same category. I don't know if that categorization actually reflects reality, and therefore I can't tell if that kind of rationalization will actually help me react to the poop in a constructive way.