Thomas Metzinger is a German philosopher and cognitive scientist known for his work on the philosophy of mind and consciousness. He is a professor at the Johannes Gutenberg University Mainz and has published extensively on topics such as self-awareness, the nature of consciousness, and the relationship between the mind and the brain. Metzinger is particularly recognized for his book, Being No One, where he argues that the self is an illusion created by the brain. He proposes that our experience of being a unified self is a result of complex cognitive processes, challenging traditional views of personal identity and consciousness.