Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun US, idiomatic for application of common sense and/or intuition regardless of technical parameters.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the expression "If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck".

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Examples

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