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

While at work, a man suddenly collapsed at a table and vomited blood. Several of his coworkers were nearby and started screaming, but no one called an ambulance. The man died on the spot. Why on earth did this happen?

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

While at work, a man suddenly collapsed at a table and vomited blood. Several of his coworkers were nearby and started screaming, but no one called an ambulance. The man died on the spot. Why on earth did this happen?

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