MP~M is a 3-valued logic propositional calculus system which is based on the medium logic system, and it is used to deal with the incomplete information in the database.

MP~M系统是在中介逻辑系统的基础上建立起来的，用于处理数据库中不完全信息的三值逻辑命题演算系统。

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Earlier this week, a Socialist MP made a written request to the transport secretary to obtain more information on the cost of the new plane. which was ordered two years ago.

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The MP had previously obtained a court order requesting the phone be handed over with any relevant information, but the newspaper was unable to provide it.

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