What words did you use to come to the conclusion that his doctoral studies are in philosophy? The story doesn’t even say Ph.D., let alone the word philosophy. Even if it did say Ph.D., that is just a title and rarely has anything to do with philosophy. Engineers, Physicists, Mathematicians, etc all get Ph.D. titles when they go for a doctorate.
What words did you use to come to the conclusion that his doctoral studies are in philosophy? The story doesn’t even say Ph.D., let alone the word philosophy. Even if it did say Ph.D., that is just a title and rarely has anything to do with philosophy. Engineers, Physicists, Mathematicians, etc all get Ph.D. titles when they go for a doctorate.