Hmm... I am stubborn, but I would agree with letting the offspring if the two could be a pair, breed with other gene poolsThat's no reason to let a unique species completely disappear.. It's extinction via stubbornness.
And even if the pair in Vietnam are male/female and even if they breed successfully and even if most or all of the young grow to sexual maturity, are we to consciously allow the gene-pool to remain so inbred when at least a little distinct blood can be added in?
~Thylo