|Observation sentence also protocol sentence or basis sentence: Description of a sensually perceived event. Observation sentences are not irreversible and not independent of theories because of the vocabulary used in them.|
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|Hacking I 193
Science theory/Hacking: around 1965 it was in vogue: that there is no principle distinction between theoretical statements and observation statements. (Lakatos).
The Methodology of Scientific Research Programmes: Volume 1: Philosophical Papers (Philosophical Papers (Cambridge)) Cambridge 1980
Einführung in die Philosophie der Naturwissenschaften Stuttgart 1996