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What is the main advantage of a symbolic system over a learned one?

  • A.It is more robust to noisy or unusual inputs than a learned system
  • B.It can be trained more quickly on modern computing hardware
  • C.Its reasoning can be inspected and explained step by step
  • D.It requires far more data to reach the same level of performance

Answer: C

Because the knowledge is explicit, a symbolic system can produce a derivation showing why it reached its conclusion, which matters in medicine, law and any regulated domain. It needs little or no data but a great deal of expert effort, and it is notably brittle at the edges of its knowledge. Training speed is not a meaningful comparison. Explainability is the property that has kept symbolic methods in use despite the successes of learning.

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