Silly question

[Iscah]

I think you need to read up on the definition of 'source'.

The definition of source is the "thing or place from which something comes, arises, or is obtained"; alternately from my hard-copy Oxford dictionary the "origin; place from which thing comes or is got".

Different things have different sources.

The source for "information that identifies Au Ra as the progeny of dragons" can only be something with the authority to make that confirmation: either the game canon or an official statement, as Rongway listed in detail.

Therefore, by saying there are "sources" that state this is true, you implicitly indicate that it has been said by someone with the authority to make it true.

A random person on the internet does not have that authority. They can only be a source for speculation, not fact.