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Theory/Feyerabend: no theory always agrees with all the facts in its field, but the error is not always with the theory. Facts are constituted by older ideologies, and a contradiction between facts and theories can be a sign of progress. What basic principles are hidden in the concepts of observation?
Facts/Feyerabend: not strong enough to cause the acceptance or rejection of scientific theories. They leave too much room for thought.
Wider den Methodenzwang Frankfurt 1997
Erkenntnis für freie Menschen Frankfurt 1979