premise: Gertrude has visited Tucson, Truth or Consequences, Moore, Ada, Longmont, Tennessee, Battle Creek, New Bedford, Huntington, North Adams, East Hartford, Walla Walla, Gulfport, Mountain View, Perry, Skokie, Astoria, Dixon, Greenfield, Janesville, Jamestown, Del Rio, Odessa, Las Cruces, Charleston and Traverse City
hypothesis: Gertrude has visited less than thirty places