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Is the philosophy of K.Popper anti-foundationalist ?

2006, Karl Popper. A Centenary Assessment

Abstract

It is usually accepted that the philosophy of Karl Popper is “anti-justificationnist”: we do not have to “justify” our theories or propositions, to provide the reasons why we consider them to be true. Our only concern should be to confront them with empirical facts, and to try to falsify them. All our propositions are hypotheses, whose value we can only assess a posteriori, never a priori by questioning for example their origin, their relations for example with experience or with the faculties of the subject. Should we also understand this approach as “anti-foundationnist”? In this, Popper would then oppose a well established philosophical tradition, defended in particular by Kant: the role of the philosophy, in this tradition, should be to bring to light the fundament of our knowledge, of our way of thinking and of acting; and this represents the condition of any evaluation about the way we develop our knowledge or we decide to act, the condition also of the definition of any methodology for science or for practical behaviour. For many Poppers’ readers, this is an approach that Popper refuses: his philosophy should be considered as a critical one, and this criticism is endless. In other words, there is no reason to look for any ground, any basic principle on which this philosophical criticism should rest. This interpretation is questionable, particularly if we pay attention to the texts of the “late” Popper, the texts he wrote after 1960. In these texts, Popper undertakes to reformulate his methodology as a very general one, embedding the methodology of science in a more general scheme of the activity of the life: knowledge is trying to resolve problems; all organisms are engaged, day and nights, in problem-solving; science should be seen as a continuation – greatly improved – of the life activities of all organisms. For Popper, this is not just a metaphorical way of talking. It is an attempt to insert his researches in philosophy of sciences into a biological, evolutionist “Weltanschauung”. It is a way to provide a metaphysical foundation to his philosophy. If this is the case, it leads us to put afresh different questions: - Was Popper, in the thirties, anti-foundationnist or not? My thesis is that he was not. What we took for anti-foundationnism is two quite different positions: his opposition to “subjectivism” – the main point on which he criticises Kant – and of “empiricism” – which is at the core of all his criticisms towards the “Vienna Circle” and its “philosophy of language”. - Why did Popper feel the need, in the fifties and after, to develop what we could call “a metaphysics of life”? My thesis here is that he felt necessary, after “The Open Society and its Enemies”, and the moral philosophy he tried to outline in this book, to establish firmer ground for the moral decisions of the individuals. Without such – objective – ground, morality would dissolve itself into subjectivity and relativity. Values, if they are more than individual decisions or social conventions, require foundations. The popperian evolutionist theory, which is a metaphysical theory, provide them. At the core of the issue, what is at stake is the question of the scepticism. Popper tried to refute scepticism by defending his “falsification” theory. But later he realised that this theory was not sufficient. By showing that the process of knowledge, as all live process, is a progressive one, that after hypotheses, trials and errors, organisms and individuals gain new knowledge, achieve new steps, he gave himself a far stronger argument against scepticism. It is life which demonstrate, in practical acts, that scepticism is a pure and foolish speculation.