[Differentiaing genetic make-ups] ...tinkering away alone in the dark. It's what suits him best.

(ii) the differentia has a rational relation to the object sought to be achieved by the law in question.

(i) the classification is founded on an intelligible differentia which distinguishes persons that are grouped together from others left out of the group; and

Where there is a classification founded on an intelligible differentia which distinguishes persons that are grouped together from others left out of the group and the differentia has a rational relation to the object sought to be achieved by the law in question, the discrimination is valid.

Frank Horn maintains that the fact that reservations purport to produce certain specific legal effects is the “differentia specifica” of this type of unilateral act (see A/CN.4/614/Add.1, note 200, T.M.C.

The differentia specifica of the “political” vis-à-vis the largest sense of the “international” is that in the sphere of international politics all means and methods possible can be employed, including force, with the caveat that political actors enter into this arena (or are there and want to remain) in a conscious way (this can be called political will), and know that by employing certain means, others could respond by similar means.