Two law professors are using their new website to predict Supreme Court case outcomes based on oral arguments.

Oral arguments contain a lot of “unmined” information that provides fodder for analysis, Tonja Jacobi, who launched SCOTUSOA with Matthew Sag, told Bloomberg Law.

That information includes how much each side said relative to the other, and whether this relates to who wins and loses, Jacobi said. Do people who ultimately lose talk more? she asked.

Jacobi is a professor...