That’s Judge Donato, asking an important question of Google’s economist — and her answer left both of us scratching our heads.

She says her definition of the relevant product market is “facilitation of digital content transactions.”

“When I say facilitation, I mean making sure these interactions between app developers and app users go well,” she adds.

The skepticism on the judge’s face was palpable. He had her clarify again a few minutes later, then moved on.