Comment by irjustin

> Heisenberg says the more accurately you measure one property, the less accurately you can measure a second [related] property.

mmm you've redescribed what the parent post was saying.

Heisenberg's principal is about the _knowability_ and not the measurement. So it's fundamental regardless of whether you measure it or not.

This is why it's impossible to cool something to absolute zero. Because fundamentally, it's position is becoming knowable, so it gains momentum, regardless if it's being measured or not.