He was always good for a quote, wasn’t he?
«I am disillusioned enough to know that no man’s opinion on any subject is worth a damn unless backed up with enough genuine information to make him really know what he’s talking about.»
H.P. Lovecraft (in a letter to Mr. Harris, February 25 to March 1, 1929).
(I know, the preferred spelling in American English is «skeptic», but considering the strong Anglophilia of HPL, I deem the British form more appropriate here.)