<![CDATA[Since the emergence of the Sleeping Beauty Problem, the debate between thirder and halfer has continued. This debate has even evolved into a more specific form with certain modifications to test whether the thirder and halfer arguments are tenable in certain cases. However, discussions attempting to untangle this debate are relatively few. In this paper, I propose the thesis that differences in the interpretation of probability are the cause of the emergence of the thirder and halfer dualism. To demonstrate this thesis, I will argue using a conceptual analysis of the concept of ‘probability’, which is the point of difference between thirder and halfer. The analysis reveals that thirder interpret probability epistemically (epistemological interpretation), while halfer interpret probability ontically (objective interpretation). However, a review of the interpretation of probability is not enough to provide an adequate answer in terms of determining the correct interpretation of probability if this debate is expanded in the context of practical applications.]]>
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