So many individuals acting selfishly have priced the horse correctly.

Despite his successes, he was accused of acting selfishly.

"Both acted selfishly, so each of us receives just one point."

He's angry with Lucie, who admits that she was acting selfishly.

Gambling on the altruism of others, while acting selfishly.

In this case, the first prisoner to act selfishly goes free while the other remains in prison.

"Logic dictates that the first player to act selfishly will always fare better."

It demonstrates that while cooperation would give the best outcome, people might nevertheless act selfishly.

He studies situations in which two players must choose either to cooperate with each other or to "defect" by acting selfishly.

I realized that at home I was acting selfishly, and it brought down the whole family.