“Skepticism as a philosophy is not merely doubt, but what may be called dogmatic doubt. The man of science says ‘I think it is so-and-so, but I am not sure.’ The man of intellectual curiosity says ‘I don’t know how it is, but I hope to find out.’ The philosophical Skeptic says ‘nobody knows and nobody ever can know.’ It is this element of dogmatism that makes the system vulnerable.”
Bertrand Russell, A History of Western Philosophy