The Holocaust Gas Chambers were not used for execution

Zyklon BAs we have established, hydrogen cyanide is the gas released by Zyklon B, which was used to kill the prisoners. We can then establish that Zyklon B itself was not used to kill, but rather, to release the gas that is in it. My opponent's claim here is that Zyklon B is not efficient in killing people. This argument is obviously false, because hydrogen cyanide is what was used to kill the prisoners, being released by Zyklon B. "While some claim that the gas would need a lot of time to kill, because it would have to spread all over the chamber, it simply is not true; the gas chambers were not that large (those in Krematoria II and III were about 210 square meters), and the Zyklon-B was dropped from four openings (still visible in the ruins of the gas chambers). Since the concentration used was higher than the lethal one, death was very swift."[1] "For example, a room 5 m x 10 m x 3 m (150 cu m) contains roughly 150 kg of air, and would require (150,000 grams x 300)/ 1,000,000 = 45 grams (1.6 oz) of hydrogen cyanide to achieve a lethal concentration."[2] From this, one cannot as easily make the claim (there were also ventilation systems) that HCN would take a lot of time to kill.Endangered ExecutionersMy opponent's argument on the validity of the concrete covers' ability to cover the holes perfectly is a bit overemphasized. The surface area of the holes themselves are much smaller than the cover's surface. Therefore, the cover would be able to completely cover the holes just fine. Even if the orifices did not cover the holes all the way, the amount of HCN that would leak out would not be enough to kill the executioners that are handling it.Without the dampness from the chambers, the Zyklon B would not have been able to release. The Zyklon B pellets would not be able to work unless exposed to water.TestimoniesPro states that the differences between Broad's and Hoess's testimonies are "major inconsistencies". However, his argument supporting so does not undermine the legitimacy of the gassings themselves. Remember that gassings are dependent on:-The temperature-The number of people in the room-The size of the room-The amount of gas being poured into the room-Psychological difference in time perception by different observersI wouldn't say that perception in time is valid enough for someone to take two hours and change it into thirty minutes. However, there are many others factors included. To simply point out that certain time durations vary, yet ignore the many different conditions that apply, is not a credible argument. Also, there is indeed emotional connections and third party influences involved in some cases, but to say so doesn't mean that every testimonial account of the gassings is wrong. As for memory problems, I believe that case is exaggerated a bit. When one reads the testimony of a witness who described the gassing process in such detail, one cannot simply make the case the memory problems were an influence, because the testimonies don't seem to have a lack of detail in them; the processes are described well, and all are very similar.Sources1. http://www.nizkor.org...2. http://www.debate.org...