# Puzzle | Thief, Treasure and 2 Doors

**Puzzle:**

**A thief** has just found a **pair of ancient treasure caves**.

- One of the caves is filled with unbelievable treasure and the other has a fire breathing monster that will eat anyone

who opens that cave. - One cave has a black door decorated with diamonds and the other cave has a brown door decorated with sapphires.
- Each of the doors has an engraved description on top. The descriptions say:
**Black Door:**Monster is here.

**Brown Door:**Only One Door speaks the truth.

### Which door should the thief open?

**Solution:**

Let us look at the description on the **Brown door**. It can be correct or wrong.

**Scenario 1:**The description on the**Brown door**is**true**. Then the description on the**Black door**has to be true. That means that the inscription on the**Black door is false**and the cave with**black door**contains the treasure!**Scenario 2:**The description on the**Brown door**is false. Then either both the descriptions are false or both are true. Both cannot be true as that is impossible and not consistent. That means that both descriptions are false. Again,**the treasure is in the Black door.**

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