[fluoridation]

There's a definite distinction there, though, with regards to immediacy of cause and effect. "Picking up an item and walking off" is a crime or not depending on circumstances that are present at the moment the item is picked up, even if both you and I don't realize the item doesn't belong to me; the same is true for self-defense vs. murder. If I do something to you as innocuous as placing a traffic cone on the hood of your car that triggers a "for want of a nail" situation that ends up in someone terminating a business partnership with you, that's something that neither you nor I could have predicted at the time I did whatever it was to you.