 If we omitted all that is unclear we would probably be left with completely uninteresting and trivial tautologies.In the early 20th century, logical positivism—a descendant of Comte's basic thesis but an independent movement—sprang up in Vienna and grew to become one of the dominant schools in Anglo-American philosophy and the analytic tradition.Logical positivists (or 'neopositivists') rejected metaphysical speculation and attempted to reduce statements and propositions to pure logic.