> A simulated heart does not pump real blood.

Well, now, a simulated heartbeat implemented in a pacemaker and connected to a pump does cause real blood to be pumped.

A real brain adds real numbers, and so does a computer brain. A real brain composes real words, creates real emails, issues payments, requests shipments. Those are not less real than the words, emails, procedures, payments, and shipment requests that computers make today.