It's deductive reasoning, Sherlock.<quoted text>
Wow this poster must be omnipotent, knowing things about someone via an anonymous message board. Just because he/she says so, it must be true...
People who play sports interact with other people. When you interact with other people you learn some social skills and how not to be a weird socially awkward nerd.
Bored is a weird socially awkward nerd, ergo he hasn't played sports.
He was home-schooled by his agoraphobic grandma. He's had no real male role-models in his life. They were a poor family and he had to wear his sisters hand-me-downs until he was around 13 or so. Last year he got his first pair of pants. When he's 15 he hopes to actually get a t-shirt instead of a blouse. He's read a few books but didn't really understand them because he had no personal world-knowledge to identify with.