So I happened to read this article on wikipedia about soundness and there is this example of sound argument:
An argument is sound if and only if
- The argument is valid.
- All of its premises are true.
- All men are mortal.
- Socrates is a man.
- Therefore, Socrates is mortal.
The argument is valid (because the conclusion is true based on the premises, that is, that the conclusion follows the premises) and since the premises are in fact true, the argument is sound.
There is nothing wrong in my perspective, but what if there is a religion/person that does not believe in mortality. For such religion/person all men are mortal is FALSE therefore argument is not sound.
So, how can one decide\know if premise is true or false?
That opens another question, why is there soundness property at all?
I am sorry if this kind of question was covered in another thread.