Your question is still silly. You act as if some specific person had to invent a rule.
You invented the rule because you stated the rule.
I have explained to you why you should have realized that it was correct with just a little thought. It appears that you are trying to justify people making false claims that they cannot support.
And we are not talking about mere beliefs here. I pointed out that if someone simply said "I believe" I would not have a problem with that. It is when someone makes the claim of "I know" when they have to be able to support their claims.
I say I know because I know, but that is not something I can prove to anyone else. There are many different ways of knowing and not all of them are based upon facts that can be proven.
Definition of know
1a(1): to perceive directly
: have direct cognition of
(2): to have understanding of
importance of knowing oneself (3): to recognize the nature of
: discern
b(1): to recognize as being the same as something previously
known(2): to be acquainted or familiar with
(3): to have experience of
2a: to be aware of the truth or factuality of
: be convinced or certain of
b: to have a practical understanding of
knows how to write
Definition of KNOW
Anytime that someone claims to know something they are taking on a burden of proof.
No, not unless they are trying to
prove what they know is true in a debate or in a court of law.
Please note, I do not make the mistake of the theists here. I do not claim to know that there is no God. I can refute certain variations of God, but that does not mean that I can refute all of them. And if I do say that I can refute one the burden of proof to do so is upon me.
Go ahead, claim that you believe in a God. I will not say that you do not believe. But if you claim to know then you need to be able to support that claim. The same standard applies to me, which is why there are only certain issues where I will claim to know.
You can claim to know there is no God and many atheists do, and I won’t tell them they have the burden of proof. Here is what I will say and have said on numerous occasions:
There are only three logical possibilities and they are mutually exclusive:
1. God exists and sends Messengers to communicate with humans (theist), or
2. God exists but does not communicate with humans (deist), or
3. God does not exist (atheist)
You can pick from the three and I won’t tell you that you have to support your choice UNLESS we are in a debate about whether God exists or not. Then I might ask you why you made that choice, but I would never ask you to prove that your choice is correct because none of the three choices can be proven correct.