but

"Negative feedback can be difficult to accept, but it often provides the most valuable learning opportunities. Teaching people to embrace feedback -- even when it's critical -- could greatly enhance learning outcomes in many fields."

But why they think so has remained subject to inquiry among scholars for the last 40 years.

For instance a rabbit can be called not only a "rabbit" or a "bunny," but also an "animal," or a "beauty," and in some contexts even a "delicacy."

But "Carlos gave Lewis a Ferrari" implies contrast with other people -- he could have given Alexandra a Ferrari.

But in the second version, the added focus, through intonation, implies that "toy" contrasts with the previously discussed "blicket."