Overlawyered.com writes

Amid brouhaha over Rand Paul views, Chicago firefighter-test case provides reminder of how discrimination law actually plays out in courts today [Tabarrok, MargRev]

Something Steve Sailer said at greater length recently. This goes back to Griggs v. Duke Power (1971):

Negro employees at respondent's generating plant brought this action, pursuant to Title VII of the Civil Rights Act of 1964, challenging respondent's requirement of a high school diploma or passing of intelligence tests as a condition of employment in or transfer to jobs at the plant. These requirements were not directed at or intended to measure ability to learn to perform a particular job or category of jobs.

As I've repeated, "The message of Griggs and "disparate impact" theory: if minorities fail tests at a higher rate than whites, it's the test that's wrong."