Countless studies have shown that humans are not blind altruists, cooperating regardless of what others do, but rather are conditional cooperators: we prefer to cooperate only when we are reasonably certain that others will too.
We will discuss both claims that deliberation and explicit communication are necessary to cooperation and systems that cooperate only through environmental interaction.
Thus, we conclude that Glo3 and ergosterol cooperate only on the localization of a subset of membrane proteins.
This implies that the principle of fair play will generate an obligation to cooperate only when the cooperative enterprise is small enough that any participant's failure to obey the rules could reasonably be expected to damage the enterprise.
Henry appealed to the barons for funds, but they agreed to cooperate only if he would accept far-reaching reforms.
Vice President Joseph R. Biden Jr. echoed those sentiments, telling Mr. Xi that the two countries could cooperate "only if the game is fair".
Today, at a meeting with a European Union delegation, Foreign Minister Kharazi declared that Iran would cooperate only with a coalition led by the United Nations.
Still, Tim Herman, one of Armstrong's lawyers, said in a statement Wednesday that Armstrong would cooperate only with "an international tribunal formed to comprehensively address pro cycling, an almost exclusively European sport".
Selfish (first defectors), who will cooperate only to avoid starvation.
Thus, rational nodes (those nodes willing to cooperate if deemed worthy) must detect and isolate selfish nodes in order to cooperate only among themselves.
