ABSTRACT
In the modern world, with its networks of communication, it is very unlikely that there remains a single community that has somehow or other managed to escape ‘discovery’. But if such a community does exist, there is one thing about it of which we can be entirely certain: its members are able to communicate very complex messages to one another by means of speech. So fundamental is this ability to human society that we should find it difficult to imagine a community of truly human beings which lacked it.
