] But "the big feature of human-level intelligence is not
] what it does when it works but what it does when it's
] stuck," Minsky said. When faced with novelty, Minsky
] claims, human intelligence applies "reasoning by analogy"
] to make the most direct tap into the cognitive glue that
] fuses knowledge domains.

With Doug Lenat, Minsky proposes that common sense is the missing factor in developing human-level AI, and that reasoning by analogy is the essential element in common-sense reasoning.