Oskar's father is the only person where he doesn't need to invent anything. It shows how Oskar has been wanting to hide the big secret of how he answered his father's call at 10:26. It seems as if Oskar's father was the only person who understood Oskar and how Oskar really looked up to his father. How he thought his dad was very intelligent because he corrected the New Yorker. The death of his father will leave an everlasting affect on Oskar.