I don't see this as abnormal. At every stage of abstraction you have to relearn things. Most professors relearn everything every year by teaching a class. Tr

I don't see this as abnormal. At every stage of abstraction you have to relearn things. Most professors relearn everything every year by teaching a class. Try implementing a basic neural network and backprop in something like numpy. If you really want to go hardcore, implement it again without numpy.