The man who invented it doesn't want it. The man who bought it doesn't need it. The man who needs it doesn't know it. What is it?

Coffin

The answer to the riddle is "coffin."

Let me explain the reasoning behind the answer:

The first clue states, "The man who invented it doesn't want it." This implies that the inventor of the object does not have any desire or need for it.

The second clue states, "The man who bought it doesn't need it." This suggests that the person who purchased the object did not require it for any particular purpose.

The third clue states, "The man who needs it doesn't know it." This indicates that the person who actually needs the object is not aware of its importance or existence.

Putting these clues together, we come to the conclusion that the answer is a "coffin." The inventor doesn't want it because it represents death, the buyer doesn't need it (as they won't be using it themselves), and the person who needs it (the deceased) is not aware of its presence.

the answer is: coffin

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The man who invented it doesn't want it. The man who bought it doesn't need it. The man who needs it doesn't know it. What is it?