On Thu, Jul 14, 2016 at 06:53:58PM +0700, Abdul Rahman Reijerink wrote:
> > By the time of the Third Imperium, there are no longer any truly
> > pureblood Terrans.  There are just those who might like to claim such
> > a thing.
>
> In imperial space most likely, but what about on the rimward side of
> Solomani space? The Ziru Sirka didn't push that far, so apart from
> scattered and isolated minor human races, there could be significant
> pockets of descendants of Solomani who've never encountered another
> major human race.

Contact, trade, and sex with extraterrestrial human races occurred
long before any Terran colonies were established.

However, you do raise an interesting point: a few generation ships
were launched in the few decades before jump drive and contact.  None
of them would have arrived at their targets for at least a thousand
years since they were limited to very primitive versions of fusion
reaction drives, and of course all the nearby ones were rapidly
contacted with jump drives.

Still, perhaps one kept going somewhere.  Maybe the intended (nearby)
destination turned out to be uninhabitable and they were able to
continue to a much more distant target.  It may have been presumed
destroyed.

In that case, it might never have been in contact with humaniti, and
those descendants might indeed have purely Terran genes.  Maybe if (on
top of the already improbable prerequisties) it founded a distant
colony and was re-contacted only within the last couple hundred years,
there might be some tiny number of pureblood Terrans in the Solomani
sphere.

Even with that fanciful scenario, routine claims by Solomani
politicians four thousand years after contact to be pureblood Terran
would be nothing but fantasy.  The best they could manage would be an
absense of records to the contrary.

- Tim