
A mystery that logic alone cannot solve
Uncover the truth with Yes/No questions

A couple, John and Sarah, went into a shop together. They each bought an item, and these items were identical in appearance and size. After returning home, John secretly swapped his item with Sarah's while she wasn't looking. However, Sarah immediately noticed the swap. Why was that?

Ask questions that can be answered with "Yes" or "No"

Keep asking questions to uncover the hidden truth

Declare your answer when you think you've solved it

A mystery that logic alone cannot solve
Uncover the truth with Yes/No questions

A couple, John and Sarah, went into a shop together. They each bought an item, and these items were identical in appearance and size. After returning home, John secretly swapped his item with Sarah's while she wasn't looking. However, Sarah immediately noticed the swap. Why was that?

Ask questions that can be answered with "Yes" or "No"

Keep asking questions to uncover the hidden truth

Declare your answer when you think you've solved it