@misc{cogprints416, month = {July}, title = {Ascribing Mental Qualities to Machines}, author = {John McCarthy}, year = {1979}, url = {http://cogprints.org/416/}, abstract = {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. } }