PGA Tour, Inc., sponsors professional golf tournaments. A player may enter in several ways, but the most common method is to successfully compete in a three-stage qualifying tournament known as the "Q-School." Anyone may enter the Q-School by submitting two letters of recommendation and paying $3,000 to cover greens fees and the cost of a golf cart, which is permitted during the first two stages, but is prohibited during the third stage. The rules governing the events include the "Rules of Golf," which apply at all levels of amateur and professional golf and do not prohibit the use of golf carts, and the "hard card," which applies specifically to the PGA tour and requires the players to walk the course during most of a tournament. Casey Martin is a talented golfer with a degenerative circulatory disorder that prevents him from walking golf courses. Martin entered the Q-School and asked for permission to use a cart during the third stage. PGA refused. Martin filed a suit in a federal district court against PGA, alleging a violation of the Americans with Disabilities Act. Is a golf cart in these circumstances a "reasonable accommodation" under the ADA? Why or why not?