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The Open Universe: An Argument for Indeterminism from the PostScript to the Logic of Scientific Discovery QUOTES

The Open Universe: An Argument for Indeterminism from the PostScript to the Logic of Scientific Discovery QUOTES

1 " I see our scientific theories as human inventions–nets designed by us to catch the world. [...] What we aim at is truth: we test our theories in the hope of eliminating those which are not true. In this way we may succeed in improving our theories–even as instruments: in making nets which are better and better adapted to catch our fish, the real world. Yet they will never be perfect instruments for this purpose. They are rational nets of our own making, and should not be mistaken for a complete representation of the real world in all its aspects; not even if they are highly successful ; not even if they appear to yield excellent approximations to reality. If we keep clearly before our minds that our theories are our own work; that we are fallible; and that our theories reflect our fallibility, then we shall doubt whether general features of our theories, such as their simplicity, or their prima facie deterministic character, correspond to features of the real world. [...] The world, as we know it, is highly complex; and although it may possess structural aspects which are simple in some sense or other, the simplicity of some of our theories–which is of our own making–does not entail the intrinsic simplicity of the world. The situation with regard to determinism is similar. Newton’s theory, consisting of the law of inertia, the law of gravity, etc., may be true, or very approximately true, i.e., the world may be as the theory asserts it is. But there is no statement of determinism in this theory; the theory nowhere asserts that the world is determined; rather it is the theory itself which as that character which I called ‘prima facie deterministic’. Now the prima facie deterministic character of a theory is closely related to its simplicity; prima facie deterministic theories are comparatively easily testable, and the tests may be made more and more precise and severe. [...] At the same time, it seems no more justifiable to infer from their success that the world has an intrinsically deterministic character than to infer that the world is intrinsically simple. "

― Karl Popper , The Open Universe: An Argument for Indeterminism from the PostScript to the Logic of Scientific Discovery