I know it when I see it. Sorry, I might be able to establish some clearer criteria if I were willing to spend hours assembling all the examples, but I'm not. If you want to believe Genesis is a parable go ahead. I'll continue to know it's history.
Most here don't have a problem with your choice on this.
I, for one, don't give a darn about what you choose to believe. However, this attitude of yours can not be allowed to extend to any teachings that are outside of theology or religious studies. If this is your attitude I don't see why you would bother to debate here or why anyone would bother to discuss it with you.