How Do We Know [That The Changes That Happen In Language Are Arbitrary Or Random]?

Drawing: Grace continues to instruct Reggie while Saussure and Big Rat play cards in the background. "The sign changes in time because the signifier has an arbitrary relationship to its signified. They do not mirror each other in this change." "Gin," yells Big Rat to Saussure.

Drawing: Reggie says to Grace, "The mirror theory helps to understand this idea. If signs reflected a real world, then the signified would be the real world. In this case, any change in the real world would trigger a corresponding change in the sign." "So," says Grace, "If trees disappeared, the word for tree would disappear. In this case, anytime a word disappears or changes, that means, according to mirror theory, the object in the real world would disappear." Saussure is seen in the background paying Big Rat out of his wallet.