Hi, I assume your friend is not a native speaker of English. You could try searching Google for examples of the usage, to show him. eg This is from the University of Oxfprd admissions site.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
CliveHi,
Your original question seemed to me to be not whether one could say both, but whether the version with 'a' was wrong.
Let's turn now to your later post.
I think there is a difference between : After a university education and After university education
. The difference may be slight but it exists . Please ,
CliveHi,
I agree with u completely that Golding had university education is wrong . I didn't say it was wrong. I said it was 'less common', and that it suggested a different meaning.
But that's not what makes me not convinced . I mean after the word " After " .
I think u accept : " After his university education , .. .