Human beings are all crazy. And if you tap on our brains just a little, we get so crazy that even other humans notice. Anosognosics are one of my favorite examples of this; people with right-hemisphere damage whose left arms become paralyzed, and who deny that their left arms are paralyzed, coming up with excuses whenever they're asked why they can't move their arms.
A truly wonderful form of brain damage - it disables your ability to notice or accept the brain damage. If you're told outright that your arm is paralyzed, you'll deny it. All the marvelous excuse-generating rationalization faculties of the brain will be mobilized to mask the damage from your own sight. As Yvain summarized:
After a right-hemisphere stroke, she lost movement in her left arm but continuously denied it. When the doctor asked her to move her arm, and she observed it not moving, she claimed that it wasn't actually her arm, it was her daughter's. Why was her daughter's arm attached to her shoulder? The patient claimed her daughter had been there in the bed with her all week. Why was her wedding ring on her daughter's hand? The patient said her daughter had borrowed it. Where was the patient's arm? The patient "turned her head and searched in a bemused way over her left shoulder".
I find it disturbing that the brain has such a simple macro for absolute denial that it can be invoked as a side effect of paralysis. That a single whack on the brain can both disable a left-side motor function, and disable our ability to recognize or accept the disability. Other forms of brain damage also seem to both cause insanity and disallow recognition of that insanity - for example, when people insist that their friends have been replaced by exact duplicates after damage to face-recognizing areas.
And it really makes you wonder...
...what if we all have some form of brain damage in common, so that none of us notice some simple and obvious fact? As blatant, perhaps, as our left arms being paralyzed? Every time this fact intrudes into our universe, we come up with some ridiculous excuse to dismiss it - as ridiculous as "It's my daughter's arm" - only there's no sane doctor watching to pursue the argument any further. (Would we all come up with the same excuse?)
If the "absolute denial macro" is that simple, and invoked that easily...
Now, suppose you built an AI. You wrote the source code yourself, and so far as you can tell by inspecting the AI's thought processes, it has no equivalent of the "absolute denial macro" - there's no point damage that could inflict on it the equivalent of anosognosia. It has redundant differently-architected systems, defending in depth against cognitive errors. If one system makes a mistake, two others will catch it. The AI has no functionality at all for deliberate rationalization, let alone the doublethink and denial-of-denial that characterizes anosognosics or humans thinking about politics. Inspecting the AI's thought processes seems to show that, in accordance with your design, the AI has no intention to deceive you, and an explicit goal of telling you the truth. And in your experience so far, the AI has been, inhumanly, well-calibrated; the AI has assigned 99% certainty on a couple of hundred occasions, and been wrong exactly twice that you know of.
Arguably, you now have far better reason to trust what the AI says to you, than to trust your own thoughts.
And now the AI tells you that it's 99.9% sure - having seen it with its own cameras, and confirmed from a hundred other sources - even though (it thinks) the human brain is built to invoke the absolute denial macro on it - that...
...what?
What's the craziest thing the AI could tell you, such that you would be willing to believe that the AI was the sane one?
(Some of my own answers appear in the comments.)
1 ) That human beings are all individual instances of the exact same mind. You're really the same person as any random other one, and vice versa. And of course that single mind had to be someone blind enough not to chance upon that fact ever, regardless of how numerous he was.
2 ) That there are only 16 real people, of which you are, and that this is all but a VR game. Subsequently results in all the players simultaneously being still unable to be conscious of that fact, AND asking that you and the AI be removed from the game. (Inspiration : misunderstanding situation in page 55-56 of Iain Banks's Look to Windwards).
3 ) That we are in the second age of the universe : time has been running backwards for a few billion years. Our minds are actually the result of the original minds of previous people being rewound, their whole life to be undone, and finally negated into oblivion. All our thoughts processes are of course horribly distorted, insane mirror versions of the originals, and make no sense whatsoever (in the original timeframe, which is the valid one).
4 )
5 ) That our true childhood is between age 0 and ~ 50-90 (with a few exceptional individuals reaching maturity sooner or later). If you thought the 'adult conspiracy' already lied a lot, and well to 'children', prepare yourself for a shock in a few decades.
6 ) That the AI just deduced that the laws of physics can only be consistent with us being eternally trapped in a time loop. The extent of the time loop is : thirty two seconds spread evenly around now. Nothing in particular can be done about it. Enjoy your remaining 10 seconds.
7 ) Causality doesn't exist. Not only is the universe timeless, but causality is an epiphenomenon, which we only believe because of a confusion of our ideas. Who ever observed a "causation" ? Did you, like, expect causation particles jumping between atoms or something ? Only correlation exists.
8 ) We actually exist in a simulation. The twist is : somewhere out there, some people really crossed the line with the ruling AI. We're slightly modified versions of these people : modified in a way as to experience the maximum amount of their zuul feeling, which is the very worst nirdy you could imagine.
9 ) The universe has actually 5 spatial macro dimensions, of which we perceive only 3. Considering what we look like if you take the other 2 into account, this obliviousness may actually not be all too surprising.
10 ) That any single human being has actually a 22 % probability of not being able to be conscious of one or more of these 9 statements above.
5) Nine-word horror story:
"We've had puberty, yes. But what about second puberty?"