I think it is implicitly clear how BioLogos comes to consider the version(s) of Evolution it asserts as “with purpose” - - it is with purpose because God is the One behind the evolutionary process! We don’t need a fancy course in Theology to arrive at that conclusion!
However, I do appreciate your statement “…it is theologically indefensible to say something is God-ordained without, at the very least, showing how this is based on clear passages in scripture…”
But is this really so difficult? BioLogos takes the story of Creation and says: this is figurative, not historical. So these texts are the specific passages in scripture you are looking for.
Ah… now you will say, where in the passages do we find the suggestion that these are Figurative instead of Literal? All these BioLogos boards are your evidence for this! The extensive discussion about the firmament shows that the writer was not attempting to write science … for we all know there is no barrier in the sky holding up the blue ocean of Heaven. Since we know this … we are left with the creation story being Figurative … not literal.
I think your posting is marvelous in helping us to sync-up the points of evidence … but in the end, your post shows why the BioLogos position is logically arranged, and where we can look for the items that you say are missing.
I wish you and yours peace and love,
GeorgeB.