Actually my methodology is to look at the overall patterns, not to get hung up on specifics. E.g. cultures around the world talk of an ancient time when there was a global flood and there was a being/s that helped the humans to survive, in vessels or in tunnels in mountains. To an extent this is supported by geology too, of global cataclysms in Earth's ancient past.
What we are not saying is that any one of these reports is to the letter accurate. But the OVERALL pattern comparing these accounts is what's so striking
But still one needs to distinguish from first hand honest accounts,and official approved written sources.
Mythology and religious texts are not necessarily first hand accounts.
Scientific documentation also suffers from one's assumptions and how one frames and collects the first hand accounts.