phenomenalism
Phenomenalism is the school that insists existence reduces solely to observed phenomena. The stance of believing nothing but appearances might be a con under the guise of scientific skepticism. Evaluating reality only by what can be touched or perceived is like streaming the world through a five-sense filter. Any underlying essence or thing-in-itself is shelved or discarded like philosophical trash. If truth is confined to what is visible, it is a grand betrayal of existence itself.