TY - GEN ID - cogprints416 UR - http://cogprints.org/416/ A1 - McCarthy, John TI - Ascribing Mental Qualities to Machines Y1 - 1979/07// N2 - Ascribing mental qualities like beliefs, intentions and wants to a machine is sometimes correct if done conservatively and is sometimes necessary to express what is known about its state. We propose some new definitional tools for this: definitions relative to an approximate theory and second order structural definitions. AV - public ER -