“The physicist’s worldview usually contains some aspect of physicalism (asserting the only “real” things are physical things, governed by physical laws), reductionism (asserting all observable phenomena are explicable in terms of their microscopic parts), and positivism or operationalism (asserting that the only meaningful concepts are empirically testable). And in recent generations more than any others, it seems, this web of attitudes permeates the zeitgeist. It is our inheritance from the success of 20th-century physics. This inheritance alters the way we frame questions about the mind and consciousness.”