original: He earned a doctorate in 1950 with a 28 page dissertation on non-cooperative games.
simplifications: He earned a doctorate in 1950 with a 28 page paper on non-cooperative games. He got a doctorate in 1950 with a 28 page paper on non-cooperative games. He earned a doctorate with a 28 page report on non-coop games. He earned a doctorate in 1950. He wrote a 28 page dissertation on non-cooperative games. He earned a doctorate in 1950. He did this with a 28 page dissertation on non-cooperative games. He earned a doctorate in 1950. He had a 28 page dissertation on non-cooperative games. He earned a PhD with a dissertation on non-cooperative games. He earned a doctorate in 1950 with an essay on non-cooperative games. He wrote a 28 page dissertation on non-cooperative games. This earned him a doctorate in 1950. He received his doctorate in 1950 with a 28-page thesis on non-cooperative games.