Re: How to Derive "Ought" From "Is" J. Searle
Posted: Fri Jul 17, 2020 8:22 am
By 'imply ' I mean imply or implies a criterion. The criterion may or may not be acceptable to the receiver of the message. All conditionals are, like turtles, criteria all the way down.Peter Holmes wrote: ↑Thu Jul 16, 2020 8:19 pmNot so. The claim 'slavery is morally wrong' is unconditional.Belinda wrote: ↑Wed Jul 15, 2020 3:13 pmAll moral claims are constructed conditionally . E.g." If you love God then you will obey Him."Peter Holmes wrote: ↑Wed Jul 15, 2020 10:59 am
We can derive an 'ought' from anything we like, including an 'is'. But an 'is' can never entail an 'ought', so that to negate the 'ought' produces a logical contradiction. The claim that honesty is essential for human society is factual. But the claim that we should be honest is not factual - not true or false.
(If everybody obeys God then everybody will cooperate.)
And anyway, these are not moral claims. They don't mention right or wrong, good or bad.But why should everyone be safe? That's an opinion - not a fact.
E.g. "You should not murder because if murder were legal nobody would be safe."Same point. 'Everyone should be safer' is an opinion - with which I agree - not a fact.
(If murder is forbidden then everybody is a little safer.)Again, that we should aim for more safety and happiness - with which i agree - is an opinion, not a fact.
E.g. " You should give to the refugees charity because refugees need your help"
(If everybody helps everybody else when they are in need then we have more safety and happiness within and among communities).That we should reduce animal suffering and the waste of resources - with which i agree - is an opinion, not a fact.
E.g." I should be vegetarian".
( If I am vegetarian then there will be a little less animal suffering, and a little less waste of natural resources.)Sorry, not following. I agree a conditional isn't a biconditional. But how can an ought in any way entail an is? Or what does 'imply' mean?
E.g. "You should join ISIS."
(If you join ISIS then you will help to bring the Caliphate.)
NB If p then q does not imply if q then p , applies to all cases.
An ought implies an is.