Everyone thinks their dog is the smartest (and they're not necessarily wrong!), but there's actually a science-backed list of the smartest dog breeds ranked by cognitive ability. Dr. Stanley Coren, a University of British Columbia professor, published research on the smartest dog breeds in his book, The Intelligence of Dogs, which is considered the gold standard for determining canine intelligence. His studies took into account each breed's memory, obedience, and problem-solving skills. Did your smart pup make the list?