One’s views about the historicity of early Genesis are a reflection of one’s view of Scripture. If one primarily views Scripture as similar to other ancient writings of the time period (Babylonian mythology, etc.), one will tend to view the Biblical writings through that lens and come up with ideas that seem sensible but actually disintegrate the unity of the Bible (and ultimately present the idea that it means something other than what it says). If one primarily views the Bible as God’s Eternal Word of Truth, as inerrant as God Himself is (though arriving by His Providence through the minds and experiences of imperfect and errant people), guarded by the Holy Spirit from any contamination or mistake, entirely pure and wholly true, one will tend to say that Scripture means exactly what it says – and that God was careful and exacting in His revelation.
Here's the video where Longman expresses his doubts . . .
8The LORD God planted a garden toward the east, in Eden; and there He placed the [committee of men] whom He had [caused to evolve].
9Out of the ground the LORD God caused to [evolve] every tree that is pleasing to the sight and good for food; the tree of life also in the midst of the garden, and the tree of the knowledge of good and evil.
(I'm skipping verses 10-14 because they're not related to the discussion)
15Then the LORD God took the [committee of men] and put [them] into the garden of Eden to cultivate it and keep it.
16The LORD God commanded the [committee of men], saying, "From any tree of the garden you [guys] may eat freely;
17but from the tree of the knowledge of good and evil you [guys] shall not eat, for in the day that you [guys] eat from it you [guys] will surely die."
18Then the LORD God said, "It is not good for the [committee of men] to be alone; I will [cause to evolve for them] a [bunch of women] suitable for [them]."
(I'm not sure how evolution works when you only have males, but I'll leave that as a question for Longman to answer)
19Out of the ground the LORD God [caused to evolve] every beast of the field and every bird of the sky, and brought them to the [committee of men] to see what [they] would call them (I guess they voted); and whatever the [committee of men] called a living creature, that was its name.
20The [committee of men] gave names to all the cattle, and to the birds of the sky, and to every beast of the field, but for [the committee of men] there was not found a [bunch of helpers] suitable for [them].
21So the LORD God caused a deep sleep to fall upon the [committee of men], and [they] slept; then He took one [or some] of [their?] ribs and closed up the flesh at that place (via some evolutionary process, no doubt).
(After all, evolution is the one thing a Bible scholar dare not cast doubt upon)
22The LORD God [caused to evolve] into a [bunch of women] the rib [or ribs] which He had taken from the [committee of men], and brought [them] to the [committee of men].
23The [committee of men] said, (Perhaps they had appointed a spokesman?)
"This is now bone of [our] bones,
And flesh of [our] flesh;
[they] shall be called [women],
Because [they were] taken out of [the committee of men]."
(at this point the logic is really breaking down!)
24For this reason (what reason? Tremper has taken all "reason" out of this passage) a man shall leave his father and his mother, and be joined to his wife; and they shall become one flesh.
25And the [committee of men] and [their wives] were [all]naked and were not ashamed.