phenomenalistic

In his historico-philosophical studies, Mach developed a phenomenalistic philosophy of science which became influential in the 19th and 20th centuries.

Buddhism is also suggested to be the "honest" of the two religions, for its being strictly "phenomenalistic", and because "Christianity makes a thousand promises but keeps none."

By the phenomenalistic line of thinking, to have a visual experience of a real physical thing is to have an experience of a certain kind of group of experiences.

The Logical Structure of the World (German: "Der logische Aufbau der Welt"), in which he developed a rigorous formal version of empiricism, defining all scientific terms in phenomenalistic terms.