Conversation so far:
What did John W. Campbell have to say about pseudoscience?
In the 1930s John W. Campbell became interested in Joseph Rhine's theories about ESP.
Which John W. Campbell stories incorporated ideas about ESP?
Who Goes There? is a science fiction novella by John W. Campbell. The novella has been adapted as The Thing. The Thing is also telepathic.
What else is notable about John W. Campbell's views on pseudoscience?
John W. Campbell wrote favorably about such things as the Dean drive, a device that supposedly produced thrust in violation of Newton's third law.

Question: Did he have any critics?
Self-contained rewrite: Did John W. Campbell have any critics?