When Dr. James Naismith invented basketball, he proposed 13 rules, which he published in 1892. Naismith stipulated in one rule that “no shouldering, holding, pushing, tripping, or striking in any way the person of an opponent shall be allowed.” These actions would be known as fouls.
More than a century and multiple iterations of the game later, that definition has largely stayed the same. But Naismith’s foul rule is ever evolving. What constitutes a “strike” or a “push?”
Fouls are fouls. Except when they aren’t. Or they’re a certain type of foul. Unless they’re not.