Thanks to @John_Harshman’s alertness, I went on a search for a sentence like the one her from you:
Perhaps there is a typo and you are missing a “not” somewhere?
@swamidass’ Genealogical Adam scenarios do not propose that Adam and Eve were the first humans to walk on planet Earth.
You should check in with Joshua for clarifications.
So I have acknowledged the correction, and I put this note here to alert the new readers that there will be a “surprise reveal” later in this thread!!!
Tip: It’s based on definitions, and the multiple scenarios use multiple different definitions as possible starting points!