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Most of chapter 2 talks about people interacting with products, and how people tend to blame them self's or other things if they come across a problem when using a product or program. In most cases its not the product or the program that's making thinks not work, but that's it was just a coincidence. Take the example of the guy with the problem in the library, he was trying to search for something, then his terminal stops working. because of the coincidence of the terminal not working at the same time he was using the library program, he instantly blames the program as a conclusion. This example shows that not everyone is wrong, but that everyone form's theories or (mental Models) that explain what they have done and how they would of have worked it out.