As revealed by Trevor himself, Trevor dropped out of school, which is the possible reason why he has a lack of some basic knowledge, such as the location of ancient Rome, which he thought was a part of America. He also reveals that he has problems with grammar and "improvises" when it comes to punctuation. It is possible that he had some formal education, as he mentions during police chases that he took a night class in criminal law. Trevor has good mathematical skills, which is confirmed by Wade, who says that Trevor is very good at "numbers". Later in his life, Trevor discovered that he had a talent for flying jets. He enlisted in the Royal Canadian Air Forces to pilot fighter jets, but several days prior to completing his training and becoming a pilot, Trevor was deemed mentally unstable by the "witch" in charge of psychological evaluations, thus resulting in Trevor's discharge and grounding for life. It was implied his discharge was due to his psychological relationship with his mother.