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Only by observing this condition would the results of our work be regarded as fully conclusive and as having elucidated the normal course of the phenomena. - Ivan Pavlov Only by observing this condition would the results of our work be regarded as fully conclusive and as having elucidated the normal course of the phenomena. - Ivan Pavlov Only by observing this condition would the results of our work be regarded as fully conclusive and as having elucidated the normal course of the phenomena. - Ivan Pavlov