'We all know what good means'.

Ethical naturalism as advocated by G.E.Moore, is also an example of a consequentiality meta- ethical theory. Consequentiality derives notions of what is right or wrong from what is good or bad. For example of an ethical pluralist too, since he states that there are many good things which are good, which have intrinsic value. Another example of consequentiality ethics is utilitarianism, which states that only good thing is pleasure and the only bad …

…we would not (in later saying "happiness is good") have given anyone a reason (or even a request) to promote the existence of these brain states. If we accept that "happiness is good" has some prescriptive content, i.e. that it (in some way) implies or at least suggests "let there be more happiness", then we cannot allow "good" to be wholly descriptive... it cannot simply the name of some brain states or natural properties.