Training sequence =
The system seemed to be quite sensitive to the training sequence -the order in which experiences were given.
Surely, there is a HUGE difference between a child raised with a supervised learning when smart parents and teachers explain the core of a human language and the basic concepts and laws of environment contrasted to a merely random exploration of these rare cases of "kids raised by animals".
To train a decent neural network the order and the selection (quality) of the training data is of crucial importance. The network could evolve a much better representation if data with strong emphasis (bias) to the main features (such as humans has heads, faces has eyes, cars have wheels, languages have nouns and verbs and adjectives, etc, etc.) than mere randomized training examples.