私は彼は正直[その話を真実, 彼女は無実, その人は有罪]だと信じる[だと思う、ではないかと思う]。
I believe [think, suppose] him honest [the story true, her innocent, the man guilty].
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⇔ I believe [think, suppose] (that) he is honest [the story is true, she is innocent, the man is guilty].