Sentence:  One would need to test this <WSD>proposition</WSD> carefully ; after all , the large ( and probably unreliable ) Reader 's Digest literature on the `` most unforgettable character I ever met '' deals with village grocers , country doctors , favorite if illiterate aunts , and so forth . 
Meaning of the word marked with <WSD> tags:  (logic) a statement that affirms or denies something and is either true or false