disagreement

What is a highway to one is a disaster to the other.

I am not looking for intelligent disagreement any longer.... What I am looking for is intelligent agreement.

contradiction only exists because people are susceptible to bad moods.

Diversity and independence are important because the best collective decisions are the product of disagreement and contest, not consensus or compromise.

For as the interposition of a rivulet, however small, will occasion the line of the phalanx to fluctuate, so any trifling disagreement will be the cause of seditions.