There are two senses of 'ought' to be considered;
- 1. The typical ought arising from personal or unjustified group opinions and beliefs which Hume had critiqued.
2. The scientifically verifiable ought, e.g. potentials that is applicable to sentient Agents i.e. human subjects.
1. The typical 'ought' arising from personal or unjustified group opinions and beliefs which Hume had critiqued.
Hume discusses the problem in book III, part I, section I of his book, A Treatise of Human Nature (1739):
In every system of morality, which I have hitherto met with, I have always remarked, that the author proceeds for some time in the ordinary way of reasoning, and establishes the being of a God, or makes observations concerning human affairs;
when of a sudden I am surprised to find, that instead of the usual copulations of propositions, is, and is not, I meet with no proposition that is not connected with an ought, or an ought not.
This change is imperceptible; but is, however, of the last consequence.
For as this ought, or ought not, expresses some new relation or affirmation, it's necessary that it should be observed and explained; and at the same time that a reason should be given, for what seems altogether inconceivable, how this new relation can be a deduction from others, which are entirely different from it.
But as authors do not commonly use this precaution, I shall presume to recommend it to the readers; and am persuaded, that this small attention would subvert all the vulgar systems of morality, and let us see, that the distinction of vice and virtue is not founded merely on the relations of objects, nor is perceived by reason.[3][4]
https://en.wikipedia.org/wiki/Is%E2%80%93ought_problem
2. The scientifically verifiable oughtness, e.g. potentials that is applicable to sentient Agents i.e. human subjects.In modern times, "Hume's law" often denotes the informal thesis that, if a reasoner only has access to non-moral factual premises, the reasoner cannot logically infer the truth of moral statements; or, more broadly, that one cannot infer evaluative statements (including aesthetic statements) from non-evaluative statements.
-ibid
The oughts in the second sense are scientifically verifiable and justifiable oughtness inherently within all humans as human nature.
These objective oughtness [2] are the matter-of-facts that trigger the subjective oughts [1] within individuals.
Such oughts or oughtness are objective moral facts based on the Neurobiological Facts grounding the inherent Moral Sense related to Moral Sentiments proposed by Earl of Shaftesbury, Hume, Reid, Hutchinson, and other modern moral sense theorists exploring into moral psychology, evolutionary psychology and the neurosciences.
Whist Hume denounced NOFI in the first sense, his morality based on moral sense and sentiments is actually grounded on objective moral facts of oughtness, which as with his time, he was ignorant of the real objective facts of morality.
The basis of Hume's Morality is Sympathy [modern = empathy].Arguably the most prominent defender of moral sense theory in the history of philosophy is David Hume (1711–1776).
While he discusses morality in Book 3 [Part 1 Section 1&2*] of his Treatise of Human Nature (1739–40),
Hume's most mature, positive account of the moral sense is found in An Enquiry Concerning the Principles of Morals (1751).
https://en.wikipedia.org/wiki/Moral_sen ... ry#History
The imply Hume's b]sentiments of moral approval and disapproval[/b] are actually the ought-ness and ought-not-ness are driven by operations of empathy from a mechanism, a psychological mechanism.In the Treatise Hume details the causes of the moral sentiments, in doing so explaining why agreeable and advantageous traits prove to be the ones that generate approval.
He claims that the sentiments of moral approval and disapproval are caused by some of the operations of sympathy, which is not a feeling but rather a psychological mechanism that enables one person to receive by communication the sentiments of another (more or less what we would call empathy today).
https://plato.stanford.edu/entries/hume-moral/#symp
It is this psychological mechanism that represent the oughts in the 2nd sense which can now be verified and justified scientifically and considered within a moral FSK as objective moral facts.
There are loads of research pointing to mirror neurons [neurobiological facts] as having an impact on empathy [sympathy -Hume]
Btw, mirror neurons and empathy [sympathy] is not the sole basis for morality but there is a whole suite of neurobiological facts represent the various activities of what is morality proper that had evolved overs eons and is aligned with human nature.Many scholars believe that the mirror neurons, or at least a mirroring mechanism, can account for some basic forms of empathy. Link: