"While technical instruments are generally the result of more or less fortuitous discoveries, which are perfected and refined over time through the accumulation of practical experience, machines have a distinctive feature: they are invented, i.e. designed in advance, and we know how they will be structured, how they will work and why they will work in a certain way before they are actually built. All this amounts to saying that there is nothing mysterious about a machine, that everything is, in principle, clear and distinct."