In epistemology and the philosophy of perception, phenomenalism is the view that physical objects don't exist as things in themselves but only as perceptual phenomena or sensory stimuli (for example redness, hardness, softness, sweetness, etc.) situated in time and in space. In particular, phenomenalism reduces talk about physical objects in the external world to talk about bundles of sense-data. Historical overview Phenomenalism is a radical form of empiricism and, hence, its roots as an ontolo… (More on Phenomenalist)