numbers: cardinal / ordinal
Three versus third.
A cardinal number counts: three locks. An ordinal number ranks: the third lock. Do not use three when the rank is the point.
Examples
Usefour copies
Usethe fourth copy
Avoidthe four copy
Three versus third.
A cardinal number counts: three locks. An ordinal number ranks: the third lock. Do not use three when the rank is the point.
Usefour copies
Usethe fourth copy
Avoidthe four copy