[xanderjanz]

Umm even still, you can train it on more horse photos in order to increase its performance specifically on horses. Furthermore, you can study neron activation levels on said horse training data in order to reverse-engineer the neural "ravines" which the activations settle into. And run comparison tests about those ravines against the ravines for say zebras.

This is something actively being done by nn researches. And it lets us do things like take the low level audio processing part of a neural net trained on english voice data, and use it to train smarter neural nets on Portugese voice data than you couldn've without the English voice recordings.