WHY IT MATTERS. Long form: scroll down, or keep reading.
Short form, example 1, on the Sunday morning newsradio: "Northern Illinois and Notre Dame won." Winning streak, losing streak, we're doing our job on the academic side.
Short form, example 2, witnessed on campus. Student with nose in book making way along central mall.
Short form, example 3, theory class. "Can we practice with some Jacobians?" Hal Varian and David Kreps leave the nastier bits out of their texts ...