Substantiation is justification is proof is evidence is verification. "Justification or whatever term you want to use is material/criteria that allows a person to conclude something is true. What compels you to conclude X is true may or may not compel somebody else. What compels somebody else to conclude X is true may or may not compel you. You are presuming some sort of thing, and claiming that this thing applies to everybody.Which has to be substantiated
Consider any matter that you conluded to be true. If N is what compelled you to consider that matter true, then N is your justification. You conducted an experiment, and arrived at a conclusion. N is anything that compelled you to that conclusion. A conclusion that something is true = Belief that something is true.
You cannot just say "it has to be substantiated/justified" period. The only thing can say is: "in order for me personally to conclude something is true, I require a form of justification that I consider strong enough to compel me to arrive at that conclusion." If a dream is strong enough to compel you to a conclusion that X is true, fine. You have concluded that X is true. If highly accurate scientific scrutinization compelled you to arrive at a conclusion that X is true, fine.
Regardless of method, if somebody concludes something to be true, in every case, does that person not have some form of justification to compel him to arrive at that conclusion? If you disagree with that person's form of justification, does that mean that the person did not conclude that X is true.
-If somebody, using no form of experimentation has a dream that the Earth is round.
-And If the person's justification for concluding that the Earth is round is nothing more than his dream. (Nobody told him. Nobody showed him any proof. He did not go outside, and observe the horizon. All he has was a dream. He is using his dream as the basis for his conclusion.) "I dreamed that the Earth is round. Therefore the earth is round."
-And If you personally disagree with his reasoning for arriving at the conclusion.
-Then, does that mean that the person does not consider it true that the Earth is round? Does that mean that the Earth is not round?