The characteristics on the basis of which items are conceptually grouped should be essential, that is, explanatorily fundamental; but since Rand regards explanation as an epistemological rather than a metaphysical category, essences are objective, not intrinsic.
As a result, it may be essential that they eat more yogurt, in order to maintain a healthy level of digestion.
If this were to happen in future, it will be essential that the strong scientific and economic arguments for decarbonisation continue to prevail.
"I credit them with taking action, but it will be essential that this vast and truly historic review is done the right way".
Teacher supply is already difficult in some areas of the country and it will be essential that the government does not exacerbate this problem by presenting too many hurdles.
He then informed the dictator that he believed it to be essential that the court's decision "is not allowed to undermine the effective bilateral cooperation which has developed between the United Kingdom and Libya in recent years … not least in the crucial area of counter-terrorism".
