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doubtful; questionable; uncertain; disputable; suspicious
その情報は疑わしいと感じる。
I feel the information is doubtful.
証拠が不十分で、被告の証言は疑わしかった。
The evidence was insufficient, and the defendant's testimony was doubtful.
出所が明確なので、このデータは疑わしくない。
The source is clear, so this data is not questionable.