Well I suspect a memory system, together with stable input/output hardware, are necessary but not sufficient. To be a conscious agent, said agent's memory must

Well I suspect a memory system, together with stable input/output hardware, are necessary but not sufficient. To be a conscious agent, said agent's memory must include a representation of itself. Otherwise it can't truthfully say, "I see a pebble." Edit: it can't truthfully think, "I see a pebble."