Interesting. Nowadays it is difficult to imagine a child who cannot communicate. If it is hearing or speech impaired, there are plenty of other means of communication. But let's try to imagine such a "wolf child". A baby who has never had contact with people in childhood. Thanks to its physique, it perceives in a human way, but has no conceptualisation of it. Or a severely autistic person who has their very own perception anyway... Do they have much in common with ours?