Which of the following is not included in the list of behavioral credo propounded by David Easton -

In his eightfold "intellectual foundation stones" (credo) of behaviouralism—Regularities, Verification, Techniques, Quantification, Values (value-neutrality), Systematization, Pure Science and Integration—David Easton emphasized keeping empirical political analysis separate from ethical evaluation. Normative value judgment is therefore rejected rather than included as a tenet of the behavioural credo.