ABSTRACT
The author distinguishes between a 'strong' and a 'weak' sense of the term 'verifiable', and explains this distinction by saying that 'a proposition is said to be verifiable in the strong sense of the term, if and only if its truth could be conclusively established in experience', but that 'it is verifiable, in the weak sense, if it is possible for experience to render it probable'. The words 'transparent', 'obvious', 'clear' are, to be sure, psychological words which are often used to cajole or intimidate or to make a display of one's mental quickness. There is a story that G. H. Hardy passed over a step in the proof of a mathematical theorem he was lecturing on to his class with the comment, 'This is obvious'. For 'strongly verifiable proposition' means empirical proposition which is not subject to the process of verification, and 'weakly verifiable proposition' means empirical proposition which is subject to the process of verification.
