Intuitively, a calculator is not superhuman. A person who could do mental arithmetic as well as a calculator? That would seem to be superhuman. If you find out

Intuitively, a calculator is not superhuman. A person who could do mental arithmetic as well as a calculator? That would seem to be superhuman. If you find out that they were using a calculator under the table the whole time, they're not superhuman any more. So I think the word "superhuman" must imply a fair competition, in the sense that the participants are competing using comparable approaches. For some definition of comparable.