All testing, all confirmation and disconfirmation of a hypothesis takes place already within a system. And this system is not a more or less arbitrar… - Ludwig Wittgenstein

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All testing, all confirmation and disconfirmation of a hypothesis takes place already within a system. And this system is not a more or less arbitrary and doubtful point of departure for all our arguments: no, it belongs to the essence of what we call an argument. The system is not so much as the point of departure, as the element in which arguments have their life.