Building a brain?

Today Spiegel Online International posted an article entitled Researchers Hope to Build a Brain. The article discusses the efforts of the Blue Brain Project team (the article wrongly states that the team's name is Human Brain Project). The problem is that the article as well as the people involved with this project use the terms simulation and building almost  interchangeably, which is wrong. To build a brain means to actually construct something that will function as a brain, while simulating means that the team will write software that will function similar to bran. I can imagine that such a simulation could be implemented in an object-oriented way, where each neuron will be simulated by a very complex object. Obviously, all these objects would form a network. Now, how will they respond to external stimuli? Moreover, what will count as an external stimulus? All in all, even the simulation of the brain is a very ambitious project and I don't think we are ready to implement it. 


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