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The case of philosophers is significantly different. Being a completely general and fundamental form of critical reflection, philosophy includes all questions about the constitution of any form of life-praxis, primary or secondary, including itself. Thus philosophy both critically constitutes itself as a field or discipline of research and is perforce required for the critical constitution of all other fields or disciplines. This is why biologists who must step outside of biology in order to determine just what it means to do it and how it ought to be done thereby step into philosophy. They ask their questions as, in effect, philosophers of biology, and they are helped most in answering them by the findings of the philosophy of biology as well as of the philosophy of science more generally. There are, to be sure, certain specialists even in philosophy who can hardly be said to be responsible for critically constituting their own form of research. Historians of philosophy, for example, do not as such ask what it is to do the

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history thehistory of philosophy or how it ought to be done. But if asking such questions requires them to step outside of their own philosophical specialty, they still remain within the field or discipline of philosophy, which is exceptional, as compared with most others, precisely in being critically self-constituting.

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Here, too, however, the task of asking and answering them hardly belongs to all specialists in the field. On the contrary, neither historical theologians as such nor practical theologians as such can critically constitute even their own disciplines, much less any other or theology as a field. If they are to reflect critically on the constitution either of the field as a whole or of any of its disciplines, they must step out of historical and practical theology, even if they may and must remain within the field of theology. More exactly, they must step into the other discipline of systematic theology, to which it belongs to critically constitute both the field of theology as a whole and each of the theological

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disciplines, including itself. On the other hand, specialists in systematic theology are responsible, at least according to aptitude, for asking and answering all relevant questions about the constitution of theology as a field and of any of the several disciplines that it in turn may require or allow for.

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