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Truth/Lies Logic Puzzles

Instructions: Someone committed a crime, and the police have gathered statements from everyone. Use logic and the fact that each person either always lies or always tells the truth to figure out who is the guilty party!

See the answer for last week's puzzle

Andrew said:

Exactly one person, Douglas or Janet, lies.
Douglas cheated on the test.
Douglas said:
Both Andrew and Janet tell the truth.
I didn't cheat on the test.
Janet said:
Douglas doesn't lie.
Andrew cheated on the test.
Jason said:
Exactly one of Jason and Janet lies..
Sharon cheated on the test.
Jessica said:
Both Andrew and Douglas lie.
Douglas didn't cheat on the test.
Michelle said:
Douglas isn't telling the truth
Jessica cheated on the test.
Sharon said:
Jason doesn't lie
Jason cheated on the test.

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