I have always said that people don't realize how many a million is. It is simply not logistically feasible to kill - not to mention dispose of, which takes orders of magnitude longer - 6+ million people in the span of half a decade.

You can argue about how blue the sky is, how many angels can dance on the head of a pin, or how many ovens the Nazis had and when they had them. But the math just doesn't work out.

For example assume we go with "only" 6 million. Then we assume NO startup time, the camps and all their facilities, as well as the transported prisoners pop into existence all the way back in 1939. Even under that completely unrealistic scenario you are talking about 2700 people a day: 114 people an hour 24 hours a day, day in, day out, every single day for 2200 days straight - in time of war , not missing one single hour for broken equipment, delayed trains, or ANY other reasons.

Conceptually it is possible. But mathematically it is vanishingly unlikely.