Criticisms of The Cyc Project
The Cyc project has been described as "one of the most controversial endeavors of the artificial intelligence history", so it has inevitably garnered its share of criticism. Criticisms include:
- The complexity of the system—arguably necessitated by its encyclopedic ambitions—and the consequent difficulty in adding to the system by hand
- Scalability problems, from widespread reification, especially as constants
- Unsatisfactory treatment of the concept of substance and the related distinction between intrinsic and extrinsic properties
- The lack of any meaningful benchmark or comparison for the efficiency of Cyc's inference engine
- The current incompleteness of the system in both breadth and depth and the related difficulty in measuring its completeness
- Limited documentation
- The lack of up-to-date on-line training material makes it difficult for new people to learn the systems
- A large number of gaps in not only the ontology of ordinary objects, but an almost complete lack of relevant assertions describing such objects
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