> _do_ cause the system to change

And saying it doesn't is like saying "my one piece of litter won't make the park dirty". Just because you can't see the effect one instance has doesn't mean that it isn't meaningful when added all up.

> And saying it doesn't is like saying "my one piece of litter won't make the park dirty".

Regardless it doesn’t matter in the end. Because you don’t litter, I don’t litter, vast swaths of the population don’t litter

Yet still, I routinely see otherwise nice parks around me trashed.