Did Homo floresiensis and Homo luzonensis go extinct at the Flood?

This is detail criticism (a k a quibbles) on an article by CMI, mainly on Homo luzonensis, featuring Homo floresiensis.

What is Homo luzonensis? Ape or man?
by Matthew Cserhati, Peter Line, Joel Tay | Published: 7 November 2019
https://creation.com/what-is-homo-luzonensis

First off, no big news, CMI tends to consider them as post-Flood, since that is implied by ...

It could be that H. luzonensis is very similar to H. floresiensis and both are human, likely belonging to the Negrito population living in the Philippines. Possibly H. luzonensis, H. floresiensis and the Negritos are all inter-related.

One can have morphological parameters of Negritos without being related to them ... if they were related, arguably that would mean they were post-Flood, since the Negritos clearly are post-Flood.

In fact, they even say so:

Also, stone tools associated with a butchered rhinoceros, indicating human intelligence, were found nearby in the Cagayan Valley of northern Luzon, dated by evolutionists to between 777 and 631 ka.9 Whilst not accepting these age dates, they nonetheless indicate there was likely a human presence in the region relatively early post-Flood.

Footnote nine says : 9.Ingicco, T., van den Bergh, G.D., Jago-on, C., Bahain, J.-J, Chacón, M.G., Amano, N., et al., Earliest known hominin activity in the Philippines by 709 thousand years ago. Nature 557:233-237, 2018.

I also do not accept these dates. But the more important date is, given here, probably a carbon date:

Evolutionists claim that H. luzonensis lived 67 thousand years ago (ka).2

2.Mijares, A.S., Détroit, F., Piper, P., Grün, R., Bellwood, P., Aubert, M., Champion, G., et al., New evidence for a 67,000-year-old human presence at Callao Cave, Luzon, Philippines, J Hum Evol. 59(1):123-32, 2010.

I would take 67 thousand years ago as a pre-Flood carbon date. I would take 777 000, 709 000 and 631 000 years ago as a potassium argon date, therefore a lava date and therefore probably from very increased volcanic activity during the Flood. The nearby valley simply was covered with lava in 2957 BC, and the excess argon trapped in that lava dates to 777 000, 709 000 and 631 000 years ago.

It seems that all the latest bones or teeth (carbon dated, since organic) of Homo luzonensis and Homo floresiensis are 50 000 years ago. To me, that is a pre-Flood carbon date, since the year of the Flood has a carbon date of 40 000 years ago or 38 000 BC (like the lowest layer of the Franchthi cave in Greece, where Noah's family must have made a fire just after the Flood, on my view).

Since no Homo floresiensis or Homo luzonensis has been found carbon dated to later than 50 000 years ago, I think these populations went extinct there before the Flood. And probably by genocide (Genesis 6:11 And the earth was corrupted before God, and was filled with iniquity. Some versions give "violence").

But if they were even so related to post-Flood men like Negritos, that would imply that some of their genome were preserved via daughters in law of Noah and later reemerged more purely than Denisovan and Neanderthal genomes (which certainly do not any longer exist in the pure form, undiluted by Cro Magnon race or Homo sapiens sapiens). And then the genes reemerged in the post-Flood era to give Negritos. It is possible, but not very certain, and also, we do not have any DNA sequencing proving a genetic relation to Negritos.

Pending further information, I will conclude they were pre-Flood, extinct by genocide, not represented on the Ark in human genome, and that the size variations post-Flood reemerged to go down to the size of Luzon man in Negritos, but not (as far as found by fossils and ignoring evidence from folklore) as far down as the size of Flores hobbit, except for micro-cephaly cases.

Hans Georg Lundahl
Cergy
St. Prosdocimus of Padua
7.XI.2019