Can someone be completely tone deaf?
No. Domestic dogs and cats, for instance, respond favorably to high, feminine voices. If they were tone deaf, they wouldn't be able to tell the difference. Birds demonstrate that they are definitely not tone deaf by their songs. Animals also have different sounds they use for different occasions, including high and low tones. omg that's sooo cool!
What president was tone deaf and always said he only knew two tunes one is yankee doodle and the other isnt?
They just turn up the volume real high. If you were completely deaf, turning up the volume wouldn't help. Deaf people use a machine that is something like a computer with a keyboard and a screen, so that they type their responses, then someone from the phone company reads their response to the person on the other end, then the phone company person types in the other person's response and the deaf person reads it…