I don't think you even know what you're talking about.
Let me help you out here. You said, and I quote
"I guess because the latter have been indisputably linked, and the former have not."
The latter referring to an indisputable link between horses and eohippus, and the former being a link between mankind and chimpanzees.
I simply asked you, what it is about the eohippus to horse lineage, that you felt was superior to the lineage deriving relatedness between humans and chimps.
You couldnt answer. You simply said "Actually, I was just taking you guys at your word that it was."
Ok, so if you're just taking "you guys at your word", then here is the word, humans and chimps are indisputably linked, just as eohippus and horses are. The fossil support both lineages, as to biological studies, as well as anatomical and morphological phylogenies, biogeographic distributions, ERV studies, protein studies, and more.
I have to wonder, did any of "you guys" suggest that humans and chimps were not indisputably linked but simultaneously suggest that horses and eohippus were?