Really? I asked a question: 
Or, do you believe the human race did not stem from a man and a woman?

How ever you articulate your preference for history and the historical subjects which have gone passed, the fact is the story is based on time and creation. And of course on the first foreparents of humanity (hence, Adam - means humanity.)

"Probably in 1000 BC" is a plausible/possible reach into history, but nonetheless not an accurate scale for/of it. Thus, does not prove it was necessarily that timeframe. Surmising from historical sources is what draws that conclusion of "probably."

In the end you/some scholars/religious/non-religious prefer some artifacts of history over others to be more compelling to say the event in Eden was true or not. Merely making a myth because you/they have no preference in history for the account in the Book of Genesis, does not mean it isn't true. 

Let's use a modern analogy: A murder removes all evidence, never gets caught. Didn't happen then?