Sentence:  The very firmness of her convictions and logical <WSD>clearness</WSD> of her arguments captivated and stimulated him to make greater efforts ; usually , this is most exasperating to men , who expect every woman to verify their preconceived notions concerning her sex , and when she does not , immediately condemn her as eccentric and unwomanly . 
Meaning of the word marked with <WSD> tags:  free from obscurity and easy to understand; the comprehensibility of clear expression