Successful machine diagnosis consists not only of sound diagnostic reasoning, but also the selection of appropriate repairs, sequencing the repairs correctly, interactively validating the success of each repair, and performing follow-on diagnosis in case of repair failure. We discuss some of the issues involved in formulating a repair strategy for an expert system, review some aspects of expert...

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AphasiaDx is an expert system that has been created to assist with the diagnosis of aphasia. It has been developed using Common Lisp, Common Lisp Object System, and a logic programming system Prolisp. As part of a larger neurodiagnostic system, Neurobridge, AphasiaDx has been programmed to diagnose Broca’s aphasia, Wernicke’s Aphasia, global aphasia, mixed transcortical aphasia, transcortical s...