The way I interpret the press release is there were errors in the laboratoy tests. Noront was not happy with the quality control and quality assurance and felt it could not rely or accept the results of the assays because they were wrong. This is detirmined by control samples of known values being included in the lab work and the lab either finding something that wasn't there or not finding something that was. There is no mention of a dissatisfaction with the grades. If the lab results were unreliable, they cannot be used. The consultants are doing their job, they are working for Noront to make sure there is accuracy, not to make sure there are good grades. Once the assays are done to the accepted standards we will find out about grades.