For instance, we could visualize how an image flows through each neuron family in early vision before 3b, visualizing the image’s activation vector and attribution vector to curve neurons at each family along the way. Dataset examples that activate 3b:379 but were labelled “unrelated” by humans often contain subtle curves that are revealed by visualizing the image’s attribution to curve neurons. Subtle Curve Since curve neurons are robust to a wide variety of natural visual features, our curve tracing algorithm can be applied to subtle curves in images.