Important note: I am only using the word "real" only in the sense of meaning "is"exists and is not an illusion".
I am defining "extreme metaphysical nihilism" as the belief that "nothing is real".
I do not know if the belief that "nothing is real" is (also) called something else but if it is then please tell me.
I consider the view that "nothing is real" as being false.
A refutation of the view that "nothing is real" is that consciousness is observably real in the distinguishing and judging of realability to understand "real or unrealunreal". Mental suffering may be verified as real by observing that it exists in reality as what it is deemed to be.
Did the Buddha ever refute the view of "extreme metaphysical nihilism" i.e. a view that "nothing is real"?