Rubber duck debugging

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A rubber duck in use by a developer to aid code review

Rubber duck debugging is an informal term used in software engineering for a method of debugging code. The name is a reference to a story in the book The Pragmatic Programmer in which a programmer would carry around a rubber duck and debug his code by forcing himself to explain it, line-by-line, to the duck.[1] Many other terms exist for this technique, often involving different inanimate objects.

Many programmers have had the experience of explaining a programming problem to someone else, possibly even to someone who knows nothing about programming, and then hitting upon the solution in the process of explaining the problem. In describing what the code is supposed to do and observing what it actually does, any incongruity between these two becomes apparent.[2] By using an inanimate object, the programmer can try to accomplish this without having to involve another person.

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