It's important to realize the difference between dogma and fact. Dogma is something we've only heard about; fact is something we've actually experienced for ourselves! Dogma refers to stories or beliefs dressed up as established facts. They are passed down from generation to generation where they become established as unassailable "truths"!
It always amazes me when people speak about dogmas as established facts. Dogma as supposition is fine, but unless we experience something directly for ourselves, in a incontrovertible way, it remains speculation, not fact! It's important to anyone with a questioning mind to realize this!