4 ms·

Any act of measuring a system changes that system. How about when I measure a stick using a ruler?

• nothrabannosir 10y ago
  He means a system that can react to the measurements. Like how predicting the stock market is fundamentally impossible because whatever you do, the stock market can react to your prediction.
  • codeulike 10y ago
    But he said 'Any'. I'm looking for a counterexanple.