But you still don't have evidence of humans without the ability to synthesize the protein, so you don't have any evidence of evolution.
A more likely scenario is that human's originally was originally designed with both the ability to synthesize vitamin C as well as the ability to generate this protein whether or not they had vitamin C.
Humans, primates and guinea pigs all lost the ability of synthesize vitamin C but still have the pseudogene.
We know that the body often can compensate for the loss of some functionality. For examine, a loss of a kidney or eye, or a gall bladder, or an appendix and still function although at a suboptimal level. Thus an original design that included vitamin C sysnthesis as well as the ability to generate protein in the absence of vitamin C would be consistent with the redundancy that we often find designed in the human body.
Cluelessly vague-sounding non sequitur. One whole limb of the primate tree with omnivore dietary habits has a unique osteocalcin. This is not the only fact in the universe. There's a bigger picture.
Humans and chimps also have the same cytochrome C molecule, something we share with no other species. Humans and chimps also have the same cytochrome C gene save for one silent mutation. And there's that pseudogene thing which would have us still synthesizing vitamin C had it not been stomped on by some ancient mutation. There's the mutational drift in the pseudogene since it became a pseudogene. There's retrotransposon evidence that humans and chimps have common ancestry not shared with any other species.
But, of course, you don't know anything at all of the big picture. You wave every tiny piece of it away whenever and wherever presented. "Mountain? What mountain?" All you know of the 29+ Evidences when you see it linked is that that means it's time to link Ashby Camp's made-to-be-waved-about-and-not-read rebuttal. You don't really know anything.
You're the poster boy for what ID would turn out if it were taught in our schools.