&gt; <i>Then why do different courts come to different decisions then if this is already the case.</i><p>This is a quirk of the US Federal legal system -- independent circuits. Any sufficiently important matter is settled nationwide in US caselaw by the Supreme Court.<p>The law is incredibly consistent. You will, without recognising it, have hundreds or thousands of invisible interactions with it daily. It is incredibly robust in the face of massively variable outputs. No software product has ever come within a cooee of sustaining decades to centuries of uptime at a stretch in the face of sustained attack.