The experienced and skilled observer does not have perceptual experiences identical to those of the untrained novice when the two confront the same s… - Alan Chalmers

Two normal observers viewing the same object from the same place under the same physical circumstances do not necessarily have identical visual experiences, even though the images on their respective retinas may be virtually identical.

Many kinds of processes are at work in the world around us, and they are all superimposed on, and interact with, each other in complicated ways.

The greater the number of conjectured theories that are confronted by the realities of the world, and the more speculative those conjectures are, the greater will be the chances of major advances in science.