I went back to school in an attempt to get a second degree but never actually finished. I still put it on my resume. The thing is it was 10 years ago and obscures my first degree from 20 years ago! The downside is it lumps me in with other candidates from that era.
Its a lot of work to verify age. What is actually happening is if you look old they discriminate based on assumption. People overestimate age of bald people like myself.