"Imagining self replicating nanobots or nano machines is ridiculous." The author does not seem to understand that all of cells of life are nano machines. If you

"Imagining self replicating nanobots or nano machines is ridiculous." The author does not seem to understand that all of cells of life are nano machines. If you insist on a definition of a machine being a collection of gears and bolts, then you must expand your definition.