Also alarming - the Siemens machines already dilute samples, and the amount of dilution is set (in part) by making sure every sample test will have a usable con

Also alarming - the Siemens machines already dilute samples, and the amount of dilution is set (in part) by making sure every sample test will have a usable concentration. So Theranos didn't just dilute where others didn't, they took a system that already used up all of the 'safe' margin for dilution and knowingly added more!