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Logic/Theory/Observation/Feyerabend: good ideas can be endangered by bad test procedures. Then a purely logical method, which puts all sentences on the same level, is naïve and hinders progress. Marx saw this clearly.
Feyerabend Thesis: an examination only makes sense if such a new worldview is present. So you must be prepared to wait for decades and perhaps centuries. That involves the need to ignore large amounts of critical observations.
Wider den Methodenzwang Frankfurt 1997
Erkenntnis für freie Menschen Frankfurt 1979