In this paper, first I review the basic theories—concept and computational realization of abduction. Then I brefly review chance discovery which focuses on rare and novel events. In addition I briefly review the concept of affordance porposed by Gibson. By using the above concepts and techniques, a dementia care system inspired by affordance is proposed and discussed Finally I introduce chance discovery based curation proposed by me. The dementia care system is discussed from the aspect of communication and chance discovery based curation.
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