---
title: "counterfactual (quantum)"
source: https://www.jemoka.com/posts/kbhcounterfactual/
---

requires manipulating counterfactual information&mdash;not what the current known states are, but what are the next possible states.
Inside , there is already a few principles which are counterfactual.
Conservation of energy: a perpetual machine is *impossible Second law: its impossible to convert all heat into useful work Heisenberg&rsquo;s uncertainty: its impossible to copy reliable all states of a qubit With the impossibles, we can make the possible.
