Scientific Truth vs. Mythic Truth

Question: Are gods presumed to be so Fatebound they cannot believe where their myths have come into conflict with history?

Generally speaking, their myths usually don't come into conflict with history; if they did one thing in myth, and human history says something else happened, either A) both things happened, or B) the humans are wrong (which is only natural; it's not as if they could necessarily understand what was going on on a grand cosmic scale all the time). Because Scion incorporates all myths from all cultures and involves the normal human world as well, Storytellers have to be able to reconcile all these things on the fly; in the same way that you have to allow Odin's creation of the world and Brahma's creation of the world and Ahura Mazda's creation of the world to all be true, you also have to allow them to be true in spite of things like mortal carbon-dating and scientific theory.

It's the nature of the beast, for a fantasy game that presumes that gods and their powers are real. A lot of humanity's myths involve explaining how or why the world works the way it does - why the weaver-bird is brown, why the water is separate from the earth and the earth separate from the sky, why it's necessary to have laws to take care of people, or why corn grows to feed the masses. In the modern age, science explains those phenomena instead, but a Storyteller can't rely on scientific fact and theory in a Scion game, because by its very nature it'd exclude the gods themselves. When myth says that the Kami created the Japanese islands by dripping them from heaven with a spear, well, that probably really happened in Scion; it's mythic truth, no matter what scientists might think about it in terms of geological and volcanic motion. When myth says that the Norse won their invasion against the Slavs because the Norse gods marched with them and the Slavic gods declined, that's the mythic truth even if there's no mortal record of it and other factors like terrain and resources are the human explanation for it.

Now, things are different for Scions who become gods during the course of your game (aren't they always?). Scions who become gods have the mixed blessing and curse of seeing how humanity interprets their actions and converts them to myth in real-time. Some savvy ones may try to meddle with that, suggesting what the story should be to listening mortals; others probably just let the chips fall where they may. This does mean that occasionally a myth will not be entirely accurate to what happened - for example, while mortals believe that Sowiljr is a death-rebirth god who dies every year and is revived by his wife's sacrifices, all that actually happened was that he was badly wounded in a battle and spent several days unconscious, which they misinterpreted as him having died. He's had little luck explaining to them that he's never died, mostly because they're so ecstatically happy whenever his wife "resurrects" him, so it's become part of his Legend even though it didn't happen quite that way.

Gods are gods and their exploits are their exploits; what myth and legend says they did is what they did. They can't be treated the same as Scions because they're a different creature, in most cases without human origin and with stories that date back far too long and are far too cosmic and grandiose for a Storyteller to bother with trying to come up with possible alternate theories for all of them. But if you want to monkey around with human myth-making and expectations, Scions becoming gods is the perfect place to do that, not to mention usually being a lot of fun for players who realize that the ability to write their own Legends is at their fingertips.