In this talk/data session, I will present a preliminary analysis of the use of two historically-related final particles in Mandarin Chinese: the interrogative particle ma and a non-interrogative particle me. Although the standard romanization for these two particles suggests a difference in vowel quality, the analysis reveals that the particles differ only in prosodic composition, such that ma occurs on a high pitch and me on a low or falling pitch. The difference in pitch is not, however, limited to the particles themselves; the turns and turn-units in which the particles occur also exhibit distinct prosodic contours. The prosodic compositions of the two particles and the turns in which they occur also corresponds to distinct epistemic relations between speaker and recipient. The turns in which ma occurs serve as polar questions, formulating matters for which the recipient has primary epistemic rights. In contrast, turns with me serve as informings, formulating matters for which the speaker has primary epistemic rights. Despite these differences, I will pursue the hypothesis that ma and me are in fact two uses of a single particle. To support this hypothesis, I analyze boundary cases in which a distinction between the two particles is unclear and examine previous empirical work on other final particles in Mandarin Chinese (ou, a, and ba) that similarly exhibit interrogative and non-interrogative uses, each with corresponding prosodic distinctions.