Does the universe contain a friendly artificial superintelligence?
First and foremost, let's give a definition of "friendly artificial superintelligence" (from now on, FASI). A FASI is a computer system that: 1. is capable to deduct, reason and solve problems 2. helps human progress, is incapable to harm anybody and does not allow anybody to come to any kind...
Finally! Someone who explains (as opposed to simply downvoting) the weak points in my reasoning!
You're right, the light horizon is something I had completely forgotten to take into consideration. Just as I read your comment, I was about to object that a FASI would be able to cheat and create wormholes or Tipler cylinders to violate causality and let us know it exists anyway... then I remembered that, even if it was capable to create them, they would not allow it to reach any point in time before their creation, so it would still be incapable to escape the boundaries of its own light horizon to reach ours.
Well, point taken.