The personal taille, as it is intended to be proportioned to the profits of a certain class of people which can only be guessed at, is necessarily both arbitrary and unequal.
There are few clear demarcations, so dialect classification is necessarily to some extent arbitrary.
Because the Solar rotation is variable with latitude, depth and time, any such system is necessarily arbitrary and only makes comparison meaningful over moderate periods of time.
He brings up an interesting suggestion that ethnobiological nomenclature is not necessarily arbitrary, but often reflects some aspect of the inherent quality of the organism.
Foolish criticism is not necessarily arbitrary or willy-nilly, but it is "foolish", because it does the critic (or his intended target) no good.
The insults are graphic and personal, and were not necessarily arbitrary.
This choice is necessarily arbitrary, but efforts are made to assure that the choice is suitable.
Because of the necessarily arbitrary rendering of the perimeter, the density measurements (and the area/perimeter ratio described below) are useful only for comparisons within experiments described here.
(These cutoff criteria are necessarily arbitrary and are only justified by subsequent proof that they produced gene subsets having the desired information.)
Actions lacking a telos, a goal, are necessarily arbitrary.