[Solved] A man is discovered dead sitting at his desk, alone in the locked office.  He did not commit suicide and there was no weapons in the room. The only clue is a sealed envelope on the desk in front of him. How did he die?

This riddle has been around for some time on internet platforms such as Instagram, Facebook, and WhatsApp, and many people still argue over what the answer might be, as there are many possibilities. The correct answer is The envelope glue was poisoned and when the man licked the envelope to seal it, he died.