You are linking to a talk by Geoffrey Hinton. A strong advocate for Neural Networks. A single layer perceptron is limited, but a Neural Network with hidden laye

You are linking to a talk by Geoffrey Hinton. A strong advocate for Neural Networks. A single layer perceptron is limited, but a Neural Network with hidden layer(s) is a very powerful tool, and we have now figured out how to deal with multiple hidden layers (given enough data).