You Know God Exists (Nudge-Nudge, Wink-Wink)
Within the scope of people who claim that God exists, you usually get metaphysical arguments that 'prove' that existence. Arguments like how there must have been a first cause; how life, the Universe and everything is designed and fine-tuned; where did morality come from if not from God, how God is a necessary being, etc. But then again...
You can get some real theist "nut-jobs" like, for example, Christian apologist Sye Ten Bruggencate who gives an absolute proof of God's actual existence as follows. Everyone knows that God actually exists, therefore God actually must exist. And the actual evidence for that according to Bruggencate is stated explicitly in the Bible (Romans 1: 18-21) and you will not question this for God will not be questioned (Romans 9: 20) or mocked (Galatians 6:7). God exists because you know God exists because the Bible says so. So there! Case closed!
So the Bible is absolutely true since it is God's absolute word. Of course how do you know that God didn't lie to you? Well the obvious answer according to Bruggencate is that God doesn't lie. So there! Take that you non-believers and stick it up your - wherever.
Anyway, I gather this must be knowledge you are born with. Maybe it comes as value-adding when you get your officially heaven-issued soul. Anyway, the 'fact' that everyone knows that God actually exists certainly comes as news to me. At birth I thought we were all blank slates and dry sponges ready to absorb and assimilate whatever version of reality (nature and nurture) that reality throws at us. A blank slate means no preconceived concepts of anything, including God.
Anyway, I don't know that God actually exists. I'm sure a newborn baby hasn't a clue. An elderly person with an advanced state of dementia isn't even aware of his / her own existence and that of his / her immediate family far less that of the actual existence of an invisible magic man in the sky. Humans living 50,000 years ago didn't apparently know about God (no cave paintings of an elderly bearded male sitting up in the clouds surrounded by winged angels) and even when writing came to pass the first gods that were written about bore no similarity to the Christian God by any stretch of the imagination. Further, if everybody knew innately that there was just such a God, and only that God, then why have hundreds of other religions come up with drastically differing variation on the theme of deities? How did they arise and evolve? And if we all innately know that God exists, what's the point in sending out missionaries and putting Bibles in hotel rooms?
If you argue that there are other gods that need to be taken into consideration, well there's a ready answer for that too. There are no other gods according to Bruggencate (the Bible differs on this point in numerous chapters and verses), just idols and admitting that other 'idols' exist is idolatry and that's an absolute no-no because God, who you absolutely know exists, says so.
But apparently if you don't know that God exists then you have actually and deliberately suppressed this absolute bit of factual knowledge given to you (presumably by God Himself) for one evil or sinful reason or other.
If you have even half a rational mind to think original thoughts with then I think one can easily dismiss Sye Ten Bruggencate. But don't take my word for it. Watch Bruggencate rant and rave and all but foam at the mouth in debates, interviews and lectures on YouTube. Wow!