The difficulties connected with my criterion of demarcation (D) are important, but must not be exaggerated. It is vague, since it is a methodological rule, and since the demarcation between science and nonscience is vague....

ground rule” of science today which requires scientists to seek explanations in the world around us based upon what we can observe, test, replicate, and verify

Not only are there meaningless questions, but many of the problems with which the human intellect has tortured itself turn out to be only ‘pseudo problems,’ because they can be formulated only in terms of...