There is a legitimate argument to be had about what it is to call something a religion. From time to time the courts have faced the issue of what counts as a religion. Unsurprisingly, much of the existing case law emphasizes teachings that relate to an otherworldly or supernatural order. On this approach, atheism is not a religion. While atheists do not generally claim certainty with regard to the (non) existence of gods or God, some atheists are clearly pretty confident and forthright, and may even be sure of their positions beyond any kind of doubt that they consider reasonable. Atheists cannot be angry with God, and cannot even resent God, because they do not believe God actually exists. Atheists are often accused of being in some sort of neurotic rebellion, especially if the atheist concerned is young.