Postmodernism in White Noise

Heinrich's argument with Jack about whether or not it is raining expresses the postmodern idea that meaning is never concrete. It is obviously raining as Jack drives Heinrich to school, yet the boy will not admit that rain is falling down. He insists that there is no way to actually know whether it is raining or anything in fact when basing observation on sight because sight is unreliable. People tend to believe what they can see, so Heinrich's argument undermines an important aspect of human reason. Heinrich also uses other abstract arguments to prove to his dad that there is no way to tell if it is raining or not. His arguments convey the idea that nothing and no meaning is necessarily as it logically should be.