‘Social communication: the heart of the matter’ asks: Why can't you fully share in the social world if you are autistic? Is there an extra social sense, beyond sound, sight, or touch, that you don't have? The concept of ‘mindblindness’ is used to describe the failure of autistic children to receive and respond to social signals. A second big idea suggests that communication never gets off the ground due to a lack of social motivation; a third, that this is due to a lack of mirroring of another person's feelings, intentions, and even actions. These ideas address the problems in communication which are at the heart of autism.