Uncertainty

"The uncertainty principle tells us that we can never know exactly and simultaneously both the position and the velocity of a "particle." Because of this, the underlying laws of motion for a quantum particle have to be framed in such a way that lets us make predictions only for quantities that are the average of many individual measurements."

-Introduction to Nanoscience. SM Lindsay 2010

If there was ever a definition for a "gut" instinct - this is probably it. The affecting of one by measuring the other makes it impossible to know both. Predictions based on an average of many measurements is sometimes the best one can do.

I am not talking about science.

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