So Berklee believe that we can distinguish between reality and illusion [difference that Berkeley's distinction between the real and the imaginary, based on the difference between the clear and distinct ideas, and ideas that are not such, as well as between the ideas, not obeying and obeying our will. Reality are strong and distinct ideas that are full of life, well-ordered and are not accountable to our will.]. But what do we mean when we say about reality? Only that has a regular sensory impressions that do not occur according to our will. It is this and nothing else is meant by "reality". Adding that impressions are generated by imperceptible material substance, we do not contribute to the best explanation, and create confusion by introducing metaphysical constructs.