John Updike's observation highlights the complexity of humorists, who often blend their genuine beliefs with elements that may not be true to create an impactful effect. This approach can lead to a complicated mix of sincerity and fabrication, making it challenging to discern where their true convictions lie.

In "Rabbit, Run," Updike emphasizes that humorists navigate the fine line between truth and deception, ultimately using this blend to connect with their audience. This mixing of reality and fiction allows for a unique form of commentary while also entertaining, which can complicate the audience's perception of the humorist's intent.