Every proposition which we can understand must be composed wholly of constituents with which we are acquainted; but in order to know any proposition we surely must be able to understand it; therefore, we can have no knowledge by description. Would Russell endorse such an argument?
Key readings
(Russell, 1912, ch. V)
(Sainsbury, 1979, ch. II)
Further readings
(Russell, 1956b, chs. I and III)