Definition.com
Scepticism is not irrefutable, but obviously nonsensical, when it tries to raise doubts where no questions can be asked. For doubt can exist only where a question exists, a question only where an answer exists, and an answer only where something can be said.
Definition.com
Scepticism is the attitude assumed by the student in relation to the particulars which society adores; but which he sees to be reverent only in their tendency and spirit.
See also
.com