In The Hand, the first volume of his trilogy, Raymond Tallis looked at how humans have overcome the constraints of biology. The second volume, I Am, focused on two crucial aspects of the escape from being a mere organism: selfhood and agency. This, the final volume in the trilogy, argues that knowledge is unique to human beings and sufficiently important to call man 'the knowing animal'.Raymond Tallis examines the profound difference between knowledge 'That things are the case' and mere sentience. He criticises both accounts of knowledge that marginalise the consciousness of the knower and...