Of or pertaining to phenomenalism; partaking of or tending toward the opinion of phenomenalists that what is real is not experientially incognizable.
The Century Dictionary (Public Domain)
Use "phenomenalistic" in a sentence
"The Analysis of Matter he has left behind his “early positivistic, phenomenalistic or ˜neutrally monistic™ views.”"
"Not only does no part o the definition of neutral monism in any way require that it be even quasi-phenomenalistic, there is no phase in Russell's intellectual development at which he would simultaneously have considered himself a neutral monist and any kind of phenomenalist at all."
"But neither the anti-phenomenalistic spirit of his neutral monism, nor his explicit disavowals of phenomenalism have managed to take the wind out of the sails of the phenomenalism suspicion."