Not really sure what you mean by "threatening information to the GK". The GK-player probably cares less about this information than the GK, right? In that case, the GK is given an advantage, not a disadvantage.
In this experiment, the GK is given lots of advantages, mainly, the scenario is fictional. Some on IRC argue that the AI is also given an advantage, being able to invent cures for cancer, which an oracle AI may be able to do, but not necessarily near-future AIs, so the ability of the AI in these experiments is incredibly high.
Another thing is that emotional attacks have to travel through the fiction barrier to get to the GK. Although they have probably been shown to work in EY and Tux's experiments, the difficulty is still higher than it would be if this was a real life scenario.
The reason why GK advantages are fine in my opinion is because of the idea that despite the GK's advantages, the AI still wins. Winning with a monetary and emotional handicap only makes the AI's case stronger.
Not really sure what you mean by "threatening information to the GK". The GK-player probably cares less about this information than the GK, right? In that case, the GK is given an advantage, not a disadvantage.
As a less extreme example, the AI starts spoiling all the books/tv shows/etc. While the GK would just shrug it off, it also has a negative effect on the GK-player, potentially one strong enough for them to just forfeit.
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