To the Editor: Frequently, there is a tendency to excuse discrimination with seemingly reasonable arguments. The letter by Drs. Tinsley and McAlpine seems to be an illustration of such an excuse. This time, discrimination is hidden behind "the cost." The authors state that their faculty spent more than 70 hours reviewing every application. Is spending 70 hours reviewing 710 applications, at the rate of 10 applications per hour on average, too much time? We do not believe it is. We hope that part of the residency training director’s duties is a thorough review of each application. Seventy hours per year is not too much or too costly to get qualified residents. The postage for mailing applications is not an extreme expense, and reviewing applications, even of a large number of applicants, would not take an inordinate amount of time based on the above calculations. Thus, the cost argument seems to us to be an excuse.