The machine tells the doctor, ‘There’s a 90 per cent chance this patient has liver cancer.’ It is critical the doctors know the degree of certainty, how sure the machine is, and what it is basing its decisions on. ‘Can a system tell us, “I haven’t seen these cases before, so I am not really sure?” ’ asks Cave. ‘It needs to be able to describe its thinking process to us if we are to trust its decision-making process.’
