Judea Pearl on Human-Level AI and a Test of Free Will

A 2019 thought experiment about causal reasoning, communication and self-models.

JPJudea PearlGuest · UCLA
Channel
Lex Fridman
Published
Dec 13, 2019
Video
5:14
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1 min
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SUMMARY

In 30 seconds

Judea Pearl discusses human-level AI with Lex Fridman, proposing a soccer thought experiment and offering his views on causal reasoning, ethics and self-models. The philosophical interpretations are attributed to Pearl.

  1. 1Counterfactual questionsPearl sees counterfactual reasoning as part of the goal.
  2. 2A proposed testHe imagines robots discussing responsibility in a game.
  3. 3Ethics and models of othersHe links causal reasoning with modeling another person.
  4. 4Self-modelsHis interpretation connects self-modeling to free will and consciousness.

Takeaways

  1. Pearl sees counterfactual reasoning as a research goal.
  2. His soccer scenario is a proposed test, not an established measure.
  3. He connects ethical reasoning with models of other people.
  4. His account of free will and consciousness is a philosophical position.
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01

Human-level intelligence

Lex Fridman asks Judea Pearl about the long-term goal of human-level machine intelligence. Pearl says the idea has motivated his work, while he approaches research incrementally.

Lex Fridman asks Judea Pearl about the long-term goal of human-level machine intelligence. Pearl says the idea has motivated his work, while he approaches research incrementally.

Pearl imagines machines answering sophisticated counterfactual questions and discusses concepts such as responsibility, compassion and free will. These are his proposed research goals.

02

A soccer thought experiment

Asked how to test free will, he proposes a thought experiment involving robots communicating about rewards, punishment and responsibility while playing soccer.

Asked how to test free will, he proposes a thought experiment involving robots communicating about rewards, punishment and responsibility while playing soccer.

The question is whether communicating about a missed pass and its consequences helps the team perform better than a system without that kind of reasoning. This is a proposed test, not an established measure of free will.

Pearl argues that a coach’s concise instruction can communicate useful knowledge without directly editing another agent’s software. The recipient must interpret and apply the feedback.

03

Ethics and self-models

Fridman asks about aligning machine decisions with human values. Pearl says causal reasoning and a model of another person may be important components of an ethical system.

Fridman asks about aligning machine decisions with human values. Pearl says causal reasoning and a model of another person may be important components of an ethical system.

He describes compassion through imagining another person’s experience using a model of oneself. This is his account of a possible mechanism, not proof that a machine experiences empathy.

Pearl then discusses a system modeling its own abilities and possible changes in behavior. He connects this self-model to his account of free will and consciousness; those concepts remain debated.

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