Complex sentence: Note: the Colliers article My Life Among the Comedian's, written by Block, seems to imply he left university immediately upon being hired by Block, but does not explicitly contradict two separate reliable sources that he was writing for Baker while still in college.
Split into simpler sentences: Note: the Colliers article My Life Among the Comedian's, written by Block, seems to imply he left university immediately upon being hired by Block. The Colliers story does not explicitly contradict two separate reliable sources that he was writing for Baker while still in college.