Given the premise, is the hypothesis presenting a conflicting viewpoint? Premise: For example, Webster's Ninth New Collegiate Dictionary (1986) defines a man-about-town as a  wordly and socially active man.  Hypothesis: Webster's has never defined man-about-town.
For example, Webster's Ninth New Collegiate Dictionary (1986) defines a man-about-town as a  wordly and socially active man. ###Webster's has never defined man-about-town.