2+2=4 isn't a belief, it is a *tool*
that is what *everything* in mathematics is, mathematicians invent axioms and derive everything else from them (using formal logic, so that such derivations *must* be correct by definition), there is no ground truth to believe anything about
though if you really wanted a citation, Principia would technically be it i guess lol
> I'm sure you can find some, but what are their sources?
and so on...
the "and so on" ends with the primary source, which must have obtained the data through some kind of experiment
> no belief can be sourced infinitely, so logic and lived experience must be enough at some point
the latter is not an entailment of the former, "lived experience" should have exactly zero effect on what someone believes (anecdotes are one of the lowest forms of evidence by default, though still occasionally useful, and *heavily biased* anecdotes like personal experience are even worse to the point of being useless)
instead, all beliefs should be exclusively based on science, and science is a combination of logic and *scientific experiments*, which must use well established research methods to reduce the risk of mistakes and the effect of bias
