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## Copenhagen riddle

A Copenhagen interpretation riddle:

If a tree falls in the forest and there is no one there to hear it, was there a tree?

2. There are forests in Copenhagen?

3. ....now you say "forest" ..... but what do you really mean?

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Is the cat alive or dead before you open the box in Schroedinger's experiment?

5. Originally Posted by Disinfo Agent
Is the cat alive or dead before you open the box in Schroedinger's experiment?
Depends, did the tree fall on it? And if so, what sound did the cat make?

6. Originally Posted by mtaylor
A Copenhagen interpretation riddle:

If a tree falls in the forest and there is no one there to hear it, was there a tree?
Actually, the question is: did the tree exist before the sound was generated? Maybe the tree was a wave function of tree falling probability, and only when the sound was heard did it enter the fallen tree state.

7. Order of Kilopi
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Originally Posted by Fazor
And if so, what sound did the cat make?
The cat meeowed:

8. Problem 7 - Assume a five dimensional tree in an eleven dimensional forest...

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Problem 8: Assume a spherical tree of constant density in a frictionless forest...

Nick

10. What species of tree was it?

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If a man, in the forest, says something aloud, but there is no woman there to hear him, is he still wrong?

12. Originally Posted by Gandalf223
If a man, in the forest, says something aloud, but there is no woman there to hear him, is he still wrong?
Depends on whether or not what he said agrees with me.

13. If Nelson Riddle attempted to lead his band today, would it make a sound?

14. A duck, a priest, and a Viking walk into a bar in Copenhagen...

Oh, that's not what you meant by a Copenhagen riddle?

15. The way I ask that particular question in bull sessions is:

A tree falls in the woods with 50% probability and is thus in a superposition of states of "fallen" and "not fallen". If you later go to the woods and observe that the tree has, in fact, fallen, was there a sound?

16. According to the observer effect: if nobody has ever seen the tree then it has never become part of reality and it is in a similar state as Schrödinger's cat: still upright and fallen at the same time. When observed for the first time, it will be seen either upright or fallen. It will never have been heard falling (if it did fall).

If, however, the tree was observed sometime in the past, then it is part of reality, and when it falls, can be heard, even though nobody sees it falling...

17. The Stockholm riddle is, if a tree falls in the forest, and no one is there to hear it, can Ikea still make a bookcase out of it.

18. Originally Posted by Swift
The Stockholm riddle is, if a tree falls in the forest, and no one is there to hear it, can Ikea still make a bookcase out of it.
And the first Rimshot Award of the day goes to....

19. If it was a forest, chances was there were at least several trees or tree-like objects.

20. Originally Posted by gzhpcu
According to the observer effect: if nobody has ever seen the tree then it has never become part of reality and it is in a similar state as Schrödinger's cat: still upright and fallen at the same time. When observed for the first time, it will be seen either upright or fallen. It will never have been heard falling (if it did fall).

If, however, the tree was observed sometime in the past, then it is part of reality, and when it falls, can be heard, even though nobody sees it falling...
ok--we can see our cells, after all we see can see ourselves and are made up of cells. On the other hand, we cannot see our cells without putting them under a microscope.

So, if you have never done the last, are your cells part of reality?

21. More importantly, can a fallen tree be redeemed by confessing its sins? And if it is no longer fallen, does this introduce a logical paradox about any previously made sound?

22. The first thing you must understand is that there is no tree.

23. So if the cat is dead and therefore does not observe the observer, is the observer alive and dead at the same time?

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