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.
Neuroscientists generally assume that all mental processes have a concrete neurobiological basis.
This is vague enough to not be at all inconsistent with epiphenomenalism.
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.