Wolves and coyotes are generally agreed to be different species.
And yet there are many coyote populations that are 1-4% of wolf ancestry - much as most human populations are apparently of 1-4% of Neanderthal ancestry.
Wolves and coyotes are closely related.
Humans and Neanderthals were closely related.
But they are NOT the same species.
I think it might be more than 4%.
Who hasn’t seen those short low-browed guys with long arms and back hair walking down the street and thought or said, “Now THAT’s a neanderthal”?