The Relationship between " Must and Is"

The relationship between "must" and "is" has always been one of the most challenging issues in the field of ethical philosophy, and tackling this issue will pave the way for many other issues, including the relationship between morality and science. This paper aims at providing various assumptions about the issue of “Must and Is” and examining the possibility of realizing this relationship. The exact analysis of the problem of “Must and Is” results in the conclusion that ethical value is a real and objective matter, but moral obligation is a mentally-posited tool for motivating the audience, so that by provoking the doer into doing the moral action, the purpose and goal of Ethics, which has an inherent value, is accomplished. Given the reality of moral values, it can be argued that the concept of "value" is semantically related to the concept of "Is”, and moral propositions also represent a kind of reality. On the other hand, ethical values, due to being real, can be deduced from the immoral “Is” s. Therefore, there is a logical and inferential relationship between “Must and Is”, and ethical values ​​can be derived through reliance on immoral “Is”s.