In today’s case, the 7th U.S. Circuit Court of Appeals clarified the tests for class certification under two rules covering commonality among class members and the issue of whether common questions predominate over individual ones. The case begins with a manufacturer that sold coffee pods similar to Keurig’s K-Cups. The off-brand was designed for use in Keurig coffee makers, but the pods contained instant coffee instead of ground coffee like the original K-Cups. The new pods left a bitter taste with coffee …