[pmayrgundter]

I think this is right by the other propositions in the wiki articles, but was surprised to find out we don't know the MCRA.

"The age of the MRCA of all living humans is unknown. It is necessarily younger than the age of either the matrilinear or the patrilinear MRCA, both of which have an estimated age of between roughly 100,000 and 200,000 years ago."

"The identical ancestors point is a point in the past more remote than the MRCA at which time there are no longer organisms which are ancestral to some but not all of the modern population."

So the MCRA is < 100kya, and IAP > MCRA, so 100kya > IAP > MCRA.

https://en.wikipedia.org/wiki/Most_recent_common_ancestor