m, that Mary is a brunette or has a headache?" />
Jaakko Hintikka, Tadeusz Czarnecki , Tomasz Placek , Artur Rojszczak (2003) Philosophy and logic in search of the Polish tradition: essays in honour of jan Woleński on the occasion of his 60th birthday, Dordrecht, Springer.
pp. 193-211
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