Changes

In English, this means - for example - that if we measure the position of the particle perfectly then there ''has'' to be a non-zero error in our measurement of momentum (and similarly the reverse) and so we can ''never'' know the exact position and momentum of a particle at any instant.

In English, this means - for example - that if we measure the position of the particle perfectly then there ''has'' to be a non-zero error in our measurement of momentum (and similarly the reverse) and so we can ''never'' know the exact position and momentum of a particle at any instant.