Intelligent action begins with a plan. Just as an architect needs blueprints to evaluate options, any agent with will needs to repeatedly copy data about reality. But quantum mechanics forbids exact copying of unknown states — the fundamental theorem was discovered by Wojciech Zurek and William Wootters. A purely quantum object cannot preserve a 'snapshot' of its environment, nor compare alternative future scenarios.

You can try to copy approximately, but the quality drops below the level suitable for reliable decisions. Even executing a chosen step is hindered by the linearity of quantum equations: you can't simply single out one outcome from a multitude of superimposed probabilities. An architect in the quantum world is left without a pencil that wouldn't break with every attempt to sketch a blueprint.

The conclusion is striking: reason, will, and goal-directedness require classical 'parts' — they act as a rigid stage with clear boundaries, like spacetime curvature or the speed of light limit, against which the drama of choice unfolds. Most unexpectedly, this no-cloning prohibition is not a bug but a safeguard. It guarantees the inviolability of quantum information, paving the way to absolutely secure communication.