This isn't a good definition of collisions and I apologize
For one, I haven’t properly defined “language parser”, “language grammar” or “user input”. These terms are difficult to define, and I’m worried that any definition I assign to these is going to be invalidated immediately by counterexamples. I don’t want to get caught up in semantics right now, and I’m choosing to give up perfect descriptions in favor of an ostensive definition. With examples, I hope I am able to communicate the underlying idea, however abstract it may seem. ...