In July 1990 the Auschwitz State Museum in Poland, along with Israel's Yad Vashem Holocaust Center, reduced the estimated number of victims at Auschwitz from the four million figure engraved on the plaques down to just over 1 million. That is a reduction of almost 3 million.
Yet the claimed 6 million figure, claimed to include the Auschwitz numbers, was never revised downward. At that moment, any claims to knowing the numbers of victims are discredited.
Indeed, over the years, estimates of the total number of victims who died (of all causes) in the slave labor camps have run from 8 million during the Nuremberg trials, down to 140,000 calculated from the camp records of the International Red Cross, down to as low as 74,000 by more recent scholars.
The only thing that can be deduced from the wide variance is that we do not really know how many died (of all causes) in those slave labor camps.
But we do know lies are being told. Camp inmates were not made into soap and lampshades. There was no Camp Walszak despite Hoess's coerced confession. There was no electrical machine that simply vaporized corpses to leave no trace. And ground penetrating radar shows that there are no mass graves at Treblinka.