> The exception is helical flagella, not robots. Don't you think they're an exemption because they're alive? If seals had propellers we'd still say they swim.

> The exception is helical flagella, not robots. Don't you think they're an exemption because they're alive? If seals had propellers we'd still say they swim. Squids use jet propulsion and we still say they swim; do jetskis also swim? Somehow not.