Disney's Goofy is not a dog!!!

Today Jeremiah and I had a big debate.  He would not, could not, and still will not believe that Goofy is a dog.  He thinks that Goofy is a person.  

I completely understand his argument:

1. Goofy wears a hat.

2. Goofy wears clothes.

3. Goofy stands up.

4.  Pluto is a dog.

So I said to Jeremiah, "what is Mickey?"  "A mouse" was his reply.  "What is Donald?" "A duck" was his reply.  We went through several characters with the same rationale.  However, when we got to Goofy, he still insisted that he was a person.  The mind of a 3 year old baffles me; he can extend the boundaries of reality one way but has very strict perimeters the other way.  I don't think I will try to win this one, pick your battles right?