Vernon Deloss Walker (August 14, 1931 – April 19, 1996) was a notable advertising executive and political campaign consultant. Walker founded the Memphis, Tennessee-based advertising firm Walker + Associates, Inc. in October 1965. Walker played a major role in politics, corporate marketing and philanthropy throughout the South from the 1960s to 1990s. Using only the above description and what you know about the world, "Vernon Deloss Walker in his spare time was very into martial arts, particularly Brazilian Jiu Jitsu." is definitely correct, incorrect, or inconclusive? 