<human>:  Why do you think it is so hard to simulate the mind?
<bot>: The mind is a very complex system. It is hard to simulate because it is so complex. It is also hard to simulate because it is so big. The brain contains 100 billion neurons and each neuron has about 10,000 connections to other neurons. It is estimated that the number of synapses in the human brain is somewhere around 1 quadrillion, or 1 million trillion.