Marcel Duchamp

My Ready-Mades have nothing to do with the 'objet trouve' because the so-called 'found object' is completely directed by personal taste. Personal taste decides that this is a beautiful object and is unique.

But if, on the other hand, we should be justified in rejecting it, if there testified on oath, then, supposing our rules of evidence to be sound, we may be excused if we hesitate elsewhere to give it credence.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.