Is Trump really as inerudite as he appears?

He seems very uncomfortable with speaking, public and otherwise, and has a predilection for simple sentences and a monosyllabic vocabulary. Is this how he really is in person or is this a persona he adopted as a campaign strategy?

I have not seen many of his earlier interviews only those when he became involved with television shows. Was he the same twenty years ago?

I ask this in all seriousness and would prefer answers in kind.