Take that …

… What Physics Learns From Philosophy - NYTimes.com. (Hat tip, Dave Lull.)

Mr. Weinberg has attacked philosophical doctrines like “positivism” (which says that science should concern itself only with things that can actually be observed). But positivism happens to be a mantle in which Mr. Hawking proudly wraps himself; he has declared that he is “a positivist who believes that physical theories are just mathematical models we construct, and that it is meaningless to ask if they correspond to reality.” Is Mr. Hawking’s positivism the same positivism that Mr. Weinberg decries? That, one supposes, would be an issue for philosophical discussion.