2000 PMWC Problems/Problem I12
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Problem
During the rest hour, one of five students (, , , , and ) dropped a glass of water. The following are the responses of the children when the teacher questioned them:
- : It was or who dropped it.
- : Neither nor I did it.
- : Both and are lying.
- : Only one of or is telling the truth.
- : is not speaking the truth.
The class teacher knows that three of them NEVER lie while the other two ALWAYS lie. Who dropped the glass?