Some of the logic in Catch-22 is just weird. It involves exaggeration of certain traits or situations to the point of ridicule. Just consider the absurd as anything that a person in his right mind would not do or ever imagine. Absurdity and discontinuity show a distinct lack of cohesion and coherence and highlight the madness of the modern world. Sometimes the strangeness in things is not the situation exactly but the fact that the situation seems strangely familiar. Instances of déjà vu define surrealism and increase the absurdity of a situation because one thinks he knows what will happen in the scene.
In Catch-22, Heller exaggerates and juxtaposes character traits and situations for a purely comic effect.
In Catch-22, Heller uses themes of absurdity and surrealism to accentuate the men's isolation and frequent misunderstandings.