The idea that a norm that does not conform to the natural law cannot be legally valid is the defining thesis of conceptual naturalism. As William Blackstone describes the thesis, "This law of nature, being co-eval with mankind and dictated by God himself, is of course superior in obligation to any other. It is binding over all the globe, in all countries, and at all times: no human laws are of any validity, if contrary to this; and such of them as are valid derive all their force, and all their authority, mediately or immediately, from this original" (1979, 41). In this passage, Blackstone articulates the two claims that constitute the theoretical core of conceptual naturalism: 1) there can be no legally valid standards that conflict with the natural law; and 2) all valid laws derive what force and authority they have from the natural law.
The basis for conceptualizing the technology of food dehydration process’ inclusion in the high school curriculum and in the vocational course offering is to provide an option window for secondary level students to acquire skills and knowledge aside from the basics taught in the other subjects that can lead to a path to entrepreneurship and income generation. Prior to the revision of the basic secondary curriculum, the focus was preparing students for higher education less in knowledge base which required critical thinking skills rather than occupational learning.