Re: Article Question
Ummm.... that's a good rule, but in fact, it is sometimes used as "a PhD."
I couldn't make heads or tails of what he wrote.
Yeah, but what do you expect? He's a PhD. They're trained to write that way.
This problem seemed to complex to solve but we threw Jim and Tammy at it - they're both PhDs - and they came up with the solution.
It's a shorthand - yes, probably slangy way - to say "A person who holds a PhD."
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.