A hypothesis must be testable in order to be termed a scientific hypothesis.
A hypothesis is almost a theory in that it needs to be tested in order to become a true scientific hypothesis. These tests have to be the same every time, meaning that the hypothesis has to yield the same results each time it is tested.
There are a lot of other things that all religions share, for example:
-religious holidays (End of Ramadan for Islam, Christmas for Christians)
-theology (for example: how many Gods there are and what are their attributes)
-rules for being a part of the religion (for example baptism for Christians).
i think the answer is detective. i'm not sure cause i don't want to be a cop
