What is this? Name that fallacy

[Mister Agenda]

I might be having a brain stall but I was trying to define or label a certain argument and I'm at a loss. Maybe you guys could help me out.

The feeling I get from it is, there is no "wrong" answer. For instance, in Mormonism, the big spiel for investigators to the religion is for you to read the entire Book of Mormon and then pray to know if its true or not. There's no "it's not" answer. If you pray and the Holy Ghost gives you a warm feeling, then you know it's true. If you pray but don't feel anything, or you pray to know if the book is a lie and get a good feeling for that, then you just did it wrong or you didn't humble yourself enough to be open to God's Spirit.

brewer also posted an example of this same thing in the stupid stuff religious people say thread(in fact, it made me remember my trouble defining what this is).

Person lives: God was watching over them, it's a miracle.

Person dies: God called them home for a reason.

So, what is this called? Help a guy out. Is it circular reasoning? Is it confirmation bias?

I think it might be 'Moving the Goalposts'. No matter the result achieved, if it doesn't confirm the arguer's position, they will just change the conditions of victory.