Illogical arguments - what is actually impossible?

You are just repeating yourself day after day. You are assuming they did these things, when the science says they are impossible. Constantly repeating yourself does little credit.

Nessie wrote:

A hole/pit can be scratched out of sandy soil with bare hands and at least with a pick and shovel. Nessie says a pit is a pit so the Germans could dig pits. The Germans could build gas chambers but couldn't build one of brick that would withstand multiple atm of pressure. There are in fact numerous gas chambers in the US for the purpose of ripening fruit with ethylene and for fumigants. Nessie says a gas chamber is a gas chamber and makes no distinctions between any of them. Same with pyres. Pyres are pyres whether they contain sufficient fuel to completely cremate a body or not.

In Nessie's bizarre holyhoax la-la land the entire field of geography could be summed up as, "The world is a big place".  Were the graves at Treblinka dug with bare hands, picks and shovels or machinery? If it was machinery, what kind of machinery? Not just the make and model but was it a front-end loader? A backhoe? Cat and a can? A dragline? If the ex was hauled away from the excavation, what hauled it? Nessie acts as though all of those simple questions are arcane knowledge known only to the dead cognoscenti and lost to the mists of time.

What Nessie is actually trying to do is hide the impossibilities claimed by the alleged witnesses and himself. Brick pressure vessels don't exist so Nessie claims an unseen vent. What about the vacuum? Oh, that was just a little mistake by a few of the witnesses. Historians, archaeologists et al. claim that the graves were dug with the M&H draglines from T-I. Nessie declares that some kind of a "special machine" was used to dig the graves and everyone else is wrong. The kind of machine and how it functioned is unknown. How it was shipped into and out of Treblinka is unknown and apparently secret since its existence was unknown to everyone in the camp.

Nessie pontificates that the Germans could dig pits, transport the ex, and cremate cadavers all on the premise that such activities commonly take place. They do but not within the scope of the events described for Treblinka. Nessie tries to gloss over that fact with generalizations and declares that the impossibilities described by himself and by others were the true events of Treblinka. What bullshit.

I had just about finished an answer to Nessie when my junk HP computer performed some kind of an un-commanded exercise that erased it, apparently permanently. I shall summarize. Nessie claims that anything that he can fantasize happened because it happened. Anything else he fantasizes is substantiated by, "The eeevul Narzis knew how to get 'er done". So it goes in holyhoax la-la land.

Nessie wrote:

IOW you agree with the witnesses when they support the holyhoax but not when they drop a clanger. We don't know how the eeevul Narzis did it but they "knew how to get 'er done" and it happened because it happened. Life in holyhoax la-la land.

Let's take up your belief that engine exhaust was the lethal agent in the alleged gas chambers. Remember that almost all witnesses to the gas chamber agreed that the gas chamber was hermetically sealed. You said:

Does a gasoline engine produce enough CO to be lethal to humans? Indeed it does. You claim that the witnesses are credible since they are corroborated by other eyewitnesses. You support witnesses when you agree with them and then immediately claim that they were "mistaken" about their hermetically sealed testimony. That's a blatant hypocrisy that utterly wrecks your claim that the witnesses are credible.

Be that as it may, let's continue. The official narrative is that the engine was taken from a captured Soviet tank. We know that the Soviet tank engine was most likely the 27 liter M-5; the knockoff of the American aircraft engine. Removing an engine even from even a car and remounting it as a stationary power plant presents it's own problems. First there is an electrical system with all of its fiddly bits and no source for spare parts such as spark plugs, points, a condenser, a coil, etc. plus all of the rerouting of the wiring and fuel supply. In short, it's a giant effing hassle. Why would the Germans take on such a chore if it wasn't necessary?

The Germans had hundreds of thousands of producer gas generators in Germany. They also had huge stocks of bottled CO that was used for making steel. Would the Germans who were known for practicality and efficiency take on the unnecessary chore of removing and modifying an engine from the Soviet tank along with the attendant lack of replacement parts when they had two different and more practical and efficient sources of CO? Yes, there's a possibility but a very slim one.

Then we have your vents for the gas chambers that were "mistakenly" claimed to have been hermetically sealed. You say that they would be small, unobtrusive and easily missed by the witnesses. That's utter bullshit. At even 1,800 rpm that Soviet tank engine would be producing over 24 cubic meters of exhaust per minute. Vents would have to be substantial and not at all unobtrusive. The air in the gas chamber would be totally exchanged for engine exhaust in 5.7 minutes.

You even go so far as to claim that the signature color of lethal CO poisoning isn't pink or red in a vain attempt to protect the "credibility" of the witnesses after you have blown any such credibility out of the water by claiming that the witnesses were "mistaken" about the hermetically sealed gas chambers.

There is absolutely nothing that is credible about the Soviet tank being the source of lethal CO at Treblinka. Is it POSSIBLE that a Soviet tank engine was used to provide lethal quantities of CO at Treblinka? Yes, there was a minuscule possibility that actually happened.  That possibility  for damned sure wasn't anything to write home about.

Nessie wrote:

What vents? The vents you invented? What good would a vent do if it was hermetically sealed?

No, my statements are realistic. It is difficult to first remove and then repurpose any engine. A producer gas generator was more readily available, simple, cheap to operate and reliable. Bottled CO speaks for itself. IOW, you're full of more [excrement] than a Christmas goose, Nessie.

No, you have never shown the red/pink discoloration to come from livor mortis in cases of lethal CO poisoning with carboxyhemoglobin over 60%. You're just cherry picking your quotes.

Nessie wrote:

Nope, the Germans didn't build any hermetically sealed gas chambers that used a 27 liter gas engine as a source of CO. Neither did they build any steam or vacuum chambers. It didn't happen.

Nope, the Germans didn't dig any 25-30 meter wide and 10-12 meter deep pits with the M&H draglines from T-I. Neither did they move 190,000 to 200,000 cubic meters of soil using nothing but their bare hands and coat pockets to move the ex to some unknown location and then back to the camp. It didn't happen.

Nope, the Germans didn't pile 2,000 to 3,000 bodies on a grate that was about 1.5 meters wide and 30 meters long and totally cremate them with nothing for fuel except kindling, camp detritus or just the bodies themselves. It didn't happen.