Guidelines -- Step through process

4. Once the error is isolated, reason through the process start-to-finish, predicting what should be computed and then verifying that it has been



• When a prediction is inconsistent with an observation, the problem has been further isolated to the current step
  • The process was OK prior to this step
  • The process is incorrect after this step
• Check the inputs and reason through the step
• If bug not found, continue applying the guidelines

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