variance

Certain other factors were considered to explain the variance from expected figures. All seven aviators smoked. Each considered himself to be in good physical condition, though none found the time to exercise regularly. No aviator was obese.

But here, again, is the old variance between nature and fortune: each seems to delight in marring the work of the other.

Depending on the variance of the type constructor, the subtyping relation of the simple types may be either preserved, reversed, or ignored for the respective complex types.