The ‘double empathy’ theory suggests that autistic people are better at empathising with other autistic people, while non-autistic people can’t empathise with the autistic experience. In order to believe that autistic people empathise best with autistic people, while non-autistic people empathise better with non-autistic people, we must first accept that the diagnostic grouping ‘ASD’ identifies something fundamental about a person that all those who meet the diagnostic criteria share.