>>4986731 lb
Well, that depends on what your life events can prove to be true.
For example, praying to a specific god and having that prayer answered may seem to be a proof of that god, but this relies on the assumption that god particularly cares for our names or religions. God could simply be responding to what it sees as an agreeable request by a worthy being - or, your prayers just happen to coincide with what it is going to do, anyway (even if we don't believe in coincidence, separating the desire of a partially divine human from the efforts/intents of a divine will is not an easy task).
One can always question the 'reality' or relevancy of their experiences. I've had a dream where I was contacted by an "alien" species that I am a part of and the future leader of, as far as that detachment is concerned. "My flag" is very old and worn, amid ruins adrift. The reason I know the future is because I am here for it - oversight.
Is that real? It jives with many things I have experienced - many things that have few explanations. It certainly appeals to my boundless ego. Yet, even "we" follow a concept of god. We, the oldest life in the universe, who were here long before the gods of creation, have an entity which lay beyond the realm of direct understanding.
The concept of deity is an evolving horizon. The thing which could squash your concept of a god with a thought is still subject to something greater than itself - a process and existence it finds itself a part of, whether it wants to be or not. Even the angels have not seen the face of god.
The military has another common saying: "perception is reality." While this principle has limits, people will behave according to this principle - often times even after they have exceeded the physical bounds of reality. Real or perceived, a person who believes they know God will act according to that perceived reality.
People who believe something to be true will act as though it is - the same with things thought false. It is almost always easier for a person to double-down than it is for them to re-assess their reality. The stronger a belief or conviction, the more aggressively they will double-down.
It is a very rare individual whose response to a crack in reality is to back off and immediately re-assess; and just because a person does it once does not mean it will be reliable. Most people double-down. Further, few people spare much space for things they do not sincerely believe. Most people are not philosophers dabbling in multiple ideas concurrently, they have one solid view and don't like tinkering with it. There might be a little model on the side they play with from time to time, or enjoy touring another's model of reality for the visa stamps and frequent flier miles, but they aren't looking to remodel their understanding of reality.
So, most of the time, people will double-down until well past doubling-down doesn't work and drives into failure. Assuming the issue triggers a measurable and directly attributable failure.
Kind of like how I can look at a sink full of dishes and end up in a three hour long conversation with myself about the physics of soap bubbles, yet still not get the dishes done.
Everyone is insane. Some just have it manifest in different ways. I have to shut my brain off to get anything useful done. I believe they call this "rampancy" in popular science fiction, these days - where an intelligence literally thinks itself to death.