Actualy we 1st have to realise that God only wanted to reveal what He wanted to reveal in the face of what He knew is an extreemly hostile race, "mankind," when we choose to follow and worship our own arogance and sin nature. God allways desired we would not do so, and offers us His love as a way out of our condition and state. with this in mind, and God's desire that we come to God, thru faith, He has allways given us a cryptic record by the very nature of Biblical Hebrew, which is more complex than You could possibly imagine, unless You were a fluent expert in it ( of cource thru faith ), because look at how faithless experts muddle their conclusions. The fact is that the Gen 1: and Gen 2: creation accounts are complimentary, because of the race of "Adam," mentioned in both, a different set of terms is used for "Male," and "Female," in each account Therefore, thru "Faith," I understand and interpret the Gen 1: account to be describing the "Inner Man," nature of the male and female with disimilar Hebrew terms to highlight differences in their internal nature -for when God would have chosen to give them procreation within Marriage ( which we know they accelerated the proccess thru their sin, and not God's preferred timing ). Also, thru "Faith," I see the similar terms for male and female in Gen 2:, to be describing their similar inner nature as well, and therefore with similar and disimilar components to their nature thus being definded, for when they would procreate, and live together as a race. And yet, thru "Faith," I equaly could be correct, incorrect, or maybee a little of both. Incest, on the other hand, would not be the sin of incest -and therefore technicaly there would be no such thing, until God defined and decreed it to be so. So that is a mute ( and legaly moot ) point. It could have been that incest would not be so, until Satan introduced it as a sinful act, such as with Lot and His Daughters -thus requiring judgemnt, for example, because we do not know, Unless God tells us so!!!!!!!!!!!! So if God allways had felt that would be incest, and had intended Adam and Eve to be the Spiritual Father and Mother of the entire Human race, but not their parents, then technicaly the "Adam" race of Gen 1:, instead of being pre-adamic, could have even been co-adamic, and the different terms for male and female, were meant as spiritual designations as not the 1st two souls, but rather as under the "Aegis," of Adam and Eve, Therefore since it is not clearly addressed, ( unless, again as I hypotheticaly pointed out, once again we do not understand some technical point about the Biblical Hebrew account so given!!!!!!!!! What a suprise, we don't know everything!!!!!!!!!!!!! ) So therefore again, it will ( I suppose ) have to be one of our "Top of List," questions, for Jesus when we meet Him in Heaven, Unless God has a sense of Humor, and there is a Big Billboard in Heaven, on the way to the New Jerusalem, which answers all of our "Top Pick," questions!!!!!!!! I am treating this subject with a little Humor ( hopefully ), becuase we can not be sure to prove anything, except one thing: The Gen 1: and Gen 2: creation counts are filled with cryptic Hebrew, and a fair share of it's "anomalous" usages, for which scholars give us convoluted rules -when they are willing to acknowledge such usage, as to why the author did the best He could with His particular grasp of the working nomenclature of the syntax and Grammar of the particular language in use, And such debates as to the various changes in language in Isaiah, has scholars comming up with three Isaiah authors ( which they realy do, to eliminate the possiblity of predictive prophecy ), as well as try to force a very late date for the book of Daniel, because of some greek loan words, amongst the persian and other loan words of it's actual date ( they hope we will overlook, because they despise the concept of predictave prophecy ), or the arguments over what John could or could not have written, etc.., ( because of the lesser quality of the usage of Greek in Revelation, than the gospel, inspite of the fact that it may have been a peculiar neccessity of the apocolyptic material, because of how it wound up being structured -rather than a lack of knowledge of Greek ), etc.., And I have found in it's "Ideogram," usage of Hebrew prefixes and suffixes, along with all of it's other rules of usage, that the Genesis 1; and 2: accounts can have some different interpretations than the scholars allow as a rule, as a seperate issue from when You even follow all of their established rules, Such as were the Sun and Moon "Created," or "Apointed," on the 4th day, as one prominent Hebrew Tanach ( bible ) so translates, as well as other scholars. So as a matter of faith, we have the right to speculate, and I have no right to say that a co-adamic race under the "Spiritual parentage aegis" of Adam and Eve could not have existed. God Bless Mike