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I want to detect an image of a dart target (https://commons.wikimedia.org/wiki/File:WA_80_cm_archery_target.svg) in my iOS app. For that I am creating an object detector with CreateML. I am using the Transfer Learning algorithm and 114 annotated images, the validation data is set to auto. After 2000 iterations I got the following stats: 96% Training and 0% Validation. As I understand it, the percentages are the I/U 50% scores (= percentage of intersection over union ratios from the bounding boxes with over 50%). If the validation data is automatically chosen from the set of images, how can its score be 0%?