You’d need premises for these. And the truth of the premises must be based on evidence, otherwise you’re just making stuff up
- experience
Experience of what? That is empirical evidence.
- intuition
Intuition is a reliable source of knowledge? Where’s your evidence of that?
- testimony (i.e. belief based on authority)
Belief isn’t knowledge. There’s a fair amount belief in false authorities out there I think. And in any case, how do the authorities know stuff(supposing that they do)? By evidence.
So which of these show that GAE existed, that original sin exists, and how it is transmitted?
No because that is not a knowledge or truth-claim. It’s a method, or an operating principle. Nobody is saying “I claim to know, that what is asserted without evidence, can be discarded without evidence”.