It's a long shot but it could be the novella Three Survived by Robert Silverberg. It was originally published in 1957 then again in 1969 and most recently in 2010. However I don't think it was ever collected into an anthology.
The main character is Kilbourne, who is stranded on an alien plant when his spaceship crashes. Apart form Kilbourne the only survivors are a deckhand and the metaphysician Leswick, both of whom Kilbourne regards as useless. However his "useless" companions save his life as the deckhand provides the muscle to get them out of scrapes and the metaphysician negotiates with the alien natives.
Kilbourne describes Leswick as:
Leswick had been his pet bugaboo on the voyage up to now. He was a Metaphysical Synthesist, flaunting an impressive but meaningless degree from some Terran university. Kilbourne had only a vague idea of what Metaphysical Synthesis was—a school of philosophy attempting to unify anthropology, history, psychology, sociology, and half a dozen other inexact sciences into one confused totality, he decided—but he had little love for speculative philosophy in any case. It has no rules, his precise engineer’s mind would protest. Anything goes. It’s too damned illogical! He particularly detested Leswick’s kind of “science,” aiming at some foggy-eyed and useless synthesis of art, science, history, and other things to determine the basic forces of society.
and he is referred to throughout the story as the metaphysician.