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I suggest you will be this device. The best way to explain how a human make a decision is to demonstrate human being made a decision. This is a text and I haven't possibility to show you someone else except you.

We'll model the process of decision on different simple examples. Our measurement will be the time you need to solve the task. You don't need to find a solution of each exercises. Your estimate of the time you need to do this is good too. We'll consider principal problems and compare different variants. The precise amount of seconds, minutes or hours is not interesting for us now.