Jupiter has 30 moons can't be "my truth" even if I fervently believe it. It's something I could be wrong about and I know it, and even if I don't it has a different essence than "my truth": The way Jo (and others) are explaining "my truth," the determiner of what is true is internal to the speaker. It's not an empirical fact; it has an external truth condition.
Or something like that.