From John le Carré's 'The Tailor of Panama': "...a framed photograph that hung centre stage on the back wall, showing a Socratic , bespectacled gentleman in rounded collars and black jacket, frowning on a younger world."

I found this usage of 'Socratic' interesting, as the usages of 'Socratic' I researched since seemed to refer to philosophy, method etc., but never to an appearance...