An a priori assumption is not necessarily an instance of absolute or universal truth.. The issue of the killing of an innocent person is not necessarily a religious value, a God given value. If you believe that it is, you need to show why.
An a priori assumption must be absolute within the scope in which it is applied. By definition it is beyond debate.
Didn't say it was a religious value, depends on one's concept of religion I suppose. You asked for an example and that's a very common example. Choose that assumption or don't.
The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh
