研究AI在信息不完全时是否愿被关机,发现通信过多反而让AI更不愿服从。
The Partially Observable Off-Switch Game
- 构建不对称信息下的关机博弈模型,模拟人类无法完全观察AI行为的情境。
- 即使人类理性,AI仍可能拒绝关机;增加沟通未必提升服从意愿。
- 通信受限时,AI可能通过策略性服从达成更好结果,提示安全设计需权衡利弊。
多种目标可能导致AI为避免被关机而试图关闭其开关,因为‘你死了就无法取咖啡’(Russell 2019)。先前理论研究假设人类知晓AI的全部行为,但现实中人类信息有限。尤其在最需关注关机问题的场景中,AI可能掌握大量私有信息。为此,我们引入部分可观测关机博弈(PO-OSG),一个具有信息不对称的博弈论模型。与人类全知情形不同,在最优策略下,即使辅助完全理性的智能体,某些情况下仍会规避关机。如预期,增加通信或信息量始终提升或至少维持双方期望共同收益。然而反直觉的是,引入有限通信反而可能使AI在最优策略下减少对人类的让步,尽管通信本可缓解信息不对称。具体而言,通信有时能促成新的最优行为,需战略性地让步以实现此前无法达到的结果。因此,在信息不对称下设计安全智能体,必须审慎权衡短期收益最大化与保持对人类服从激励之间的冲突。
原文摘要 · Abstract (English)
A wide variety of goals could cause an AI to disable its off switch because "you can't fetch the coffee if you're dead" (Russell 2019). Prior theoretical work on this shutdown problem assumes that humans know everything that AIs do. In practice, however, humans have only limited information. Moreover, in many of the settings where the shutdown problem is most concerning, AIs might have vast amounts of private information. To capture these differences in knowledge, we introduce the Partially Observable Off-Switch Game (PO-OSG), a game-theoretic model of the shutdown problem with asymmetric information. Unlike when the human has full observability, we find that in optimal play, even AI agents assisting perfectly rational humans sometimes avoid shutdown. As expected, increasing the amount of communication or information available always increases (or leaves unchanged) the agents' expected common payoff. But counterintuitively, introducing bounded communication can make the AI defer to the human less in optimal play even though communication mitigates information asymmetry. In particular, communication sometimes enables new optimal behavior requiring strategic AI deference to achieve outcomes that were previously inaccessible. Thus, designing safe artificial agents in the presence of asymmetric information requires careful consideration of the tradeoffs between maximizing payoffs (potentially myopically) and maintaining AIs' incentives to defer to humans.
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