Is-Ought is David Hume isn’t it? I still find it difficult to articulate the Induction Problem, but this seems to be related in some way; that we unconsciously arrive at conclusions which don’t logically follow from the premises?
Well, yes.
It is an invalid deduction, for which the conclusion is not true as per observational evidence and even runs into the induction problem.
I will make a simple formal example.
X is Y, thus Y is Z or even X is Y, thus X is Z.
Example:
There is
only subjective
evidence for
God, thus there is
no objectively
existing
God.
That is an invalid deduction, because you simplify it as
T is S Ev for G -> T is non-O Ex G.
The trick that only subjective evidence says nothing about objective existence. What is missing is that only subjective evidence
is equal to no objective existence for all time.
The problem is that the bold
is equal to, is cognitive as a process in the mind and not objective outside the mind and for all time runs into the induction problem. The last one is the
only as the induction problem for all time.
So it is in effect a common way of making an argument and is a form of a "lazy" short cut in thinking.
And then the ought. There is no objective evidence for God, therefore we ought not believe in God. That doesn't follow and the second one is not even descriptive as an "is", it is a norm and not a description.
The trick is, that "is" has 2 meanings, descriptive and normative for the same words - That is wrong can mean 2 things. It is not so versus you ought not do it.
Now that is it for a skeptic like me. And I accept that other people understand it different and I may even be normatively wrong or even think in a wrong manner, but I still act on it. Just as other people act differently than me. That is how an illusion is unreal, yet it has real consequences in the everyday world. We all act on our individual understanding even if it the latter is really unreal and thus our acting is real if it can be observed.
The Thomas theorem: If men define situations as real, they are real in their consequences.
The absurd version. Even if really unreal, there still seem to be consequences. You can observe that one in not just this thread.
Hope it helps.