Steven Pinker on Coordination, Common Knowledge, and the Retreat of Liberal Enlightenment
Conversations with TylerKey Moments
Steven Pinker discusses common knowledge as the basis for human coordination in money, power, and relationships, while also exploring its limits and the retreat of liberal enlightenment in modern society.
Key Insights
Common knowledge, the understanding that 'everyone knows that everyone knows that...', is fundamental to human coordination in areas like currency, authority, and social norms.
While theoretical common knowledge implies infinite recursion, in practice, it's often established through salient, self-evident signals or reciprocal awareness, like eye contact.
Coordination can occur without explicit common knowledge, as seen in biological examples (coral) or simple human interactions (traffic circles), relying on implicit cues or convention.
Contemporary issues like anonymous internet commentary highlight the double-edged nature of widespread information dissemination, balancing the revelation of 'emperor's new clothes' truths with misinformation and manipulation.
The liberal enlightenment, though currently in retreat due to its counter-intuitive nature compared to tribalism and deference to authority, possesses inherent strengths in its reliance on science and universalism.
The effectiveness of Artificial Intelligence, particularly in language models, is a complex interplay of massive statistical pattern recognition and implicit linguistic insights, with potential limitations in true understanding and propensity for hallucination.
THE FOUNDATION OF HUMAN COORDINATION: COMMON KNOWLEDGE
Steven Pinker argues that common knowledge, the iterated understanding that 'everyone knows that everyone knows,' is the bedrock of human cooperation. This concept is crucial for fundamental societal structures such as the acceptance of currency, the recognition of authority, and the adherence to laws. Without this shared, recursive awareness, the intricate systems that allow economies and societies to function would collapse, leading to a drastic reduction in societal complexity and economic output.
GENERATING COMMON KNOWLEDGE IN PRACTICE
While the theoretical definition of common knowledge involves infinite loops of belief, practical application relies on more accessible mechanisms. Pinker suggests that self-evident, salient, and conspicuous signals can establish common knowledge quickly. Reciprocal eye contact, for instance, acts as an instantaneous generator of common knowledge, creating a shared understanding between individuals. These more intuitive, rather than strictly logical, processes allow common knowledge to permeate social interactions.
COORDINATION BEYOND STRICT COMMON KNOWLEDGE
Coordination, Pinker acknowledges, is not exclusively dependent on strict, recursive common knowledge. Many instances of coordination in the real world, from navigating a traffic circle to biological processes in corals releasing gametes, rely on simpler signals or ingrained evolutionary responses. These examples suggest that while common knowledge is a powerful engine for complex coordination, simpler mechanisms suffice for less intricate cooperative behaviors, often driven by public signals or instinctual responses.
THE AMBIGUITY OF INFORMATION IN THE DIGITAL AGE
The internet and anonymous online platforms present a complex paradox regarding common knowledge. While they can facilitate the quick dissemination of truths, akin to a child revealing an emperor's nakedness, they also amplify misinformation, trolling, and aggression. This raises questions about the net benefit of such open information channels, suggesting that while the 'little boy' effect is valuable, the overwhelming presence of negative aspects may render the overall impact detrimental.
THE RETREAT OF LIBERAL ENLIGHTENMENT PRINCIPLES
Pinker posits that liberal enlightenment ideals, characterized by reason, science, and universal rights, are not inherently intuitive and are currently in a state of retreat. These principles often run counter to ingrained human tendencies like tribalism and deference to authority. Despite these challenges, their reliance on evidence-based reasoning and the inherent logic of universalism provide a foundation that prevents their permanent disappearance, though they require constant reinforcement against regressive forces.
THE COMPLEXITY OF ARTIFICIAL INTELLIGENCE AND LINGUISTICS
The impact of linguistics on large language models (LLMs) is a nuanced topic. While direct integration of linguistic theories is limited, LLMs implicitly incorporate linguistic insights through their layered architectures, attention mechanisms, and token-based training. Pinker suggests that greater incorporation of linguistic principles might lead to more efficient models. However, the current reliance on immense data and computation, alongside observed confabulations, indicates that LLMs may operate on fundamentally different principles than the human brain.
THE STRUGGLE FOR OBJECTIVE QUALITY AND VALUE
Evaluating the quality of art or even subjective preferences like taste is complicated by the knowledge of provenance and context. Pinker uses examples like assessing artworks or debating film and music preferences to illustrate that objective quality can be elusive. While LLMs can mimic certain stylistic forms, human appreciation is often inseparable from the knowledge of the creator and the cultural context, making a true 'blind taste test' for artistic merit a challenge.
THE CHALLENGES CONFRONTING PROGRESS AND UNIVERSALISM
While progress in areas like the decline of human sacrifice and legal slavery indicates a historical momentum towards more enlightened societal norms, universalism itself faces significant challenges. Pinker notes that even as factual knowledge advances, the embrace of universal human rights and interests is faltering, potentially leading to increased low-level conflict between global powers. This retreat is partly attributed to the counter-intuitive nature of liberal enlightenment principles, which struggle against more primal, natural inclinations.
GRADE INFLATION AND MERITOCRATIC IDEALS AT HARVARD
Discussions on grade inflation reveal a stark contrast between institutional rhetoric and observable student performance. Pinker shares personal data from his own courses, indicating that while grades have increased, student performance on objective measures has not. He attributes this, in part, to Harvard's 'holistic' admissions criteria, which admit students based on factors beyond pure academic merit, such as athletic ability or legacy status. This suggests that a significant portion of students may not necessarily earn top grades based on consistent academic rigor alone.
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Common Questions
Money's value stems from common knowledge: everyone knows that other people will accept it for goods and services. This shared belief, that everyone knows that everyone knows money has value, is what gives it worth, and this system can unravel with hyperinflation or bank runs.
Topics
Mentioned in this video
The act of people working together, often relying on common knowledge or other signals to achieve a shared goal.
Discussed as an area heavily reliant on common knowledge, where authority can evaporate if common expectations are broken.
Cited as an example of a practice that has largely disappeared due to increased knowledge and empathy, illustrating historical momentum away from certain practices.
The Beatles album from which the song 'You Won't See Me' is chosen as a favorite.
Pinker's previous book, which he plans to revisit to assess progress and setbacks regarding liberal enlightenment.
A theorem stating that rational agents with the same priors cannot agree to disagree if they share their posteriors; their assessments must be the same.
The phenomenon of grades increasing over time beyond actual student performance, discussed in the context of elite universities like Harvard.
Author who writes about common pretense and benign hypocrisy, with examples cited by Pinker.
Mentioned as a potentially stirring, younger liberal thinker.
An ideology emphasizing reason, science, universal human rights, and the maximization of human interests, which is discussed as being in retreat.
Used as a primary example of common knowledge, where its value depends on the shared belief that others will accept it.
Steven Pinker's new book exploring common knowledge and its role in money, power, and everyday life.
Mentioned in the context of the "agree to disagree" theorem, suggesting rational agents with the same priors should not disagree if they share posteriors.
Mentioned as a potentially stirring, younger liberal thinker.
A story used as an example of how a naive observer can break a collective illusion and generate common knowledge.
Used as the classic example of a Schelling point in New York City where a separated couple might agree to meet.
Mentioned as an example of where linguistic theory is published, contrasting with the implicit linguistic insights in LLMs.
Originator of the concept of a 'Schelling point' as a coordination device based on common salience.
The central theme of the discussion, referring to situations where everyone knows that everyone else also knows something, often recursively.
A solution to a coordination problem that is salient and obvious to all parties involved, enabling coordination even without common knowledge.
Used as an example of a species coordinating reproduction based on environmental signals (full moon) without complex cognition or common knowledge.
Discussed as another practice that has declined significantly since antiquity, though acknowledging its clandestine existence.
AI models that are discussed in relation to their current capabilities and their potential connection (or lack thereof) to linguistic theory.
Used as an example to discuss subjective preferences versus objective quality and epistemic peerage.
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