True, I can imagine that as well. I guess my question was really more about prevalence. How common are these people?
I came across this in an unrelated discussion:
Neuroscientists generally assume that all mental processes have a concrete neurobiological basis.
Searching for something similar in Google Scholar might give you lots of sources to suggest to the grad student that most neuroscientists are reductionists.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
If continuing the discussion becomes impractical, that means you win at open threads; a celebratory top-level post on the topic is traditional.