An expert witness called by Samsung on Friday to testify on its behalf in the second U.S. Apple vs Samsung trial challenged an Apple witness who testified earlier, refuting some of his findings and trivializing a study on Apple’s mobile software features performed, CNET reports. Specifically, University of Pennsylvania professor of marketing David Reibstein said that Apple’s survey to determine whether people would buy certain features is like asking them whether they’d choose a car based on its cup holders. Apple’s witness, MIT Sloan School of Management John Hauser, conducted a study that showed Apple’s patented features found on Samsung devices made them more appealing to customers. Hauser surveyed 507 Samsung handset owners and 459 Samsung tablet owners to measure how many of