Getting from Generative AI to Trustworthy AI: What LLMs might learn from Cyc
Paper · 2023 · Doug Lenat and Gary Marcus
Summary
Lenat and Marcus argue that today's generative systems such as ChatGPT and Bard optimize for fluent, plausible output rather than truth. This makes them unreliable, inconsistent over time and prone to errors no human would make. They trace this to weak knowledge, reasoning and world models. The paper is a position piece and introduces no new dataset or benchmark. It first proposes 16 capabilities that a trustworthy general AI should have, including explanation, deduction, induction, analogy, abduction, theory of mind, handling of quantifiers and modal statements, defeasible beliefs, and weighing pro and con arguments. It then measures Cyc against these capabilities. Cyc is a long-running symbolic system built from hand-curated knowledge and an inference engine. The authors claim Cyc avoids the usual trade-off between expressive logic and speed, reasoning in higher-order logic in real time with fully traceable justifications. Their main conclusion is that LLMs and Cyc-style symbolic reasoning should be combined. They outline several concrete ways to do this, aiming at AI whose answers can be audited and trusted.
Key points
- The paper lists 16 desiderata for trustworthy AI. Examples include step-by-step explanation with provenance, quantifier fluency (e.g., the difference between everyone having "a king" and everyone having "a mother"), modal reasoning, and revising beliefs when new information arrives.
- The motivating LLM failures include:
- an invented journal citation;
- lawyers sanctioned for citing six nonexistent cases;
- month-to-month instability on primality questions (Chen et al., 2023);
- adversarial attacks (Zou et al., 2023).
- The authors claim Cyc performs higher-order logic inference in real time. They contrast this with fast but less expressive representations such as knowledge graphs.
- The proposed hybrid methods are:
- LLMs draft rough CycL translations of English, which Cyc then repairs and contextualizes;
- Cyc's CycL-to-English NLG generates training corrections for the LLM;
- Cyc acts as an inference "amplifier" that derives new consequences from dialogue content;
- Cyc supplies explanations and audit trails.
- The authors cite a Cycorp and Cleveland Clinic project for NIH's National Library of Medicine as an example. In it, Cyc built multi-step causal chains explaining noisy mutation–disease correlations. These chains produced intermediate predictions that could be checked against patient data.
Fields, topics and concepts
📚 Shelves 2The field of science this work belongs to (OpenAlex fields).Computer Science · 19,503 worksArtificial Intelligence · 18,805 works
🧭 Topics 2Research subjects and languages the work is about.Language models & pretraining · 4,145 worksReasoning · 1,948 works
Cite
Cite as Doug Lenat and Gary Marcus. 2023. Getting from Generative AI to Trustworthy AI: What LLMs might learn from Cyc. arXiv:2308.04445.
@misc{lenat2023getting,
title = {{Getting from Generative AI to Trustworthy AI: What LLMs might learn from Cyc}},
author = {Doug Lenat and Gary Marcus},
year = {2023},
doi = {10.48550/arxiv.2308.04445},
eprint = {2308.04445},
archivePrefix = {arXiv},
url = {https://doi.org/10.48550/arxiv.2308.04445}
}References
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