7. Misha, Sergey, and Volodya participated in a math olympiad. When discussing who among them could be the winner, the following opinions were expressed: Misha and Sergey; Misha and Volodya; Sergey, but not Volodya.

It turned out that two of the boys received winner diplomas. Who among them became the winner of the olympiad, if one of the three statements is true, another is partially true, and the third is completely false?
7. If the first assumption - Misha and Sergey turned out to be the winners - is true, then the second can be partially true, and the third assumption must then be false, but it contradicts the first.

If the second assumption - Misha and Volodya turned out to be the winners - is true, then the first assumption is partially true (Misha is a winner, but not Sergey), and the third assumption is false (Sergey, but not Volodya). Similarly, the third assumption can be considered.

Answer: Misha and Volodya received the winner's diplomas.

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