The Heisenberg Uncertainty Principle might not mean what you think it means: Hank clears things up for us in this edition of IDTIMWYTIM, by distinguishing between the Uncertainty Principle and the Observer Effect, which are often conflated.
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References:
http://hyperphysics.phy-astr.gsu.edu/hbase/uncer.html
http://science.howstuffworks.com/innovation/science-questions/quantum-suicide2.htm
http://www.aip.org/history/heisenberg/p08.htm
