Quote 6 has been guessed correctly, Chasing Amy by Kintama. Quote 5 is still up for grabs.
Quote 7 - "I beg pardon, but why am I the only one who sees that to solve crimes, to detect the guilty, we must use our brains to recognize vital clues, using up to date scientific techniques."
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"The greatest way to live with honor in this world is to be what we pretend to be."