In the TV show, The Big Bang Theory, one of the biggest mysteries revolves around Sheldon's family not attending his Nobel Prize ceremony. Despite thanking them in his speech, it was odd that his mother, sister, and father weren't there to witness his achievement. Sheldon's response suggests that he sees himself as separate from his family and believes his success is solely his own doing. This perception explains why he didn't push for them to be there and why they didn't come. In terms of storytelling, it emphasized Sheldon's friends as his chosen family.