Hm? Watching animals be animals at a zoo, is a way better sampling of how animals are animals, than for example watching that wildlife "documentary" where they'd throw lemmings of a cliff "for dramatic effect" (a "commercially corrected bias"?).
In this case, the "corrected output" is just 42, not 37, but as the temperature increases on the Y axis, we get a glimpse of internal biases, which actually let through other patterns of the training data, like the 37.