On the other hand, I call a stimulus, such a cause as sustains no reaction proportional to its effect, and the intensity of which does not vary directly in proportion to the intensity of its effect, so that the effect cannot be measured by it.
Aitzitik, kitzikapen deitzen diot bere eraginaren araberako erreakzioa jasaten ez duen kausari, eta zeinaren intentsitatea ez baitoa inondik ere paraleloki mailaren arabera efektuaren intentsitatearekin, zeina ez baitago haren arabera neurtzerik: