(A) Only calculating the mean of 17 classifications achieves an essential agreement ≥95% for reproducibility International Standards Organization, 2007, followed by the median and then the mode. There is no specified threshold for exact agreement; the trend is reversed with the mode performing best, followed by the median and then the mean. (B) Heatmaps of the consensus formed via the mean, median, or mode after 14 days incubation. Each consensus dilution is a different selection, with replacement, of the original classifications. Drug images from the larger Expert dataset are included. (C) The essential agreement between a consensus dilution formed from 17 classifications using the median or mode and the consensus Expert dilution is ≥ 90%, which is the required threshold International Standards Organization, 2007. (D) The heatmaps clearly show how the volunteer consensus dilution is likely to be the same or greater than the Expert consensus.