In the Disney cartoon universe, Goofy is not a dog. He is a person who resembles a dog, just as Mickey Mouse is a person who resembles a mouse and Donald Duck is a person who resembles a duck. Pluto, however, is an actual dog, which is why he can’t talk. read more
Goofy clearly acts 'person-like'; he talks, dresses, and walks upright, while Pluto acts more like a regular dog, but from what I can tell they're both dogs. read more