Schrodinger's cat Definition and 103 Threads

I'm sure you've all heard of Schrodinger's thought experiment regarding Quantum Mechanics. The question is: does the cat constitute an observer?

I read John Gribbon's In Search of Schrodinger's Cat recently and have spent many moments puzzling over the implications of QM. Particularly this passage: Imagine an arrangement that records which hole an electron goes through but let's it pass on its way to the detector screen. Now the...

http://www.nature.com/nsu/030929/030929-3.html