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What (who) is grim-visaged - definition

TRIGGER STRATEGY

Grim trigger strategy; Grim strategy

grim-visaged

a.

Grim-faced.

John Allen Grim

AMERICAN ECOLOGIST

Draft:John Allen Grim; John Allan Grim

John Allen Grim (born October 7, 1946) is the co-founder and co-director of the Forum on Religion and Ecology at Yale University, alongside his wife, Mary Evelyn Tucker. He teaches at Yale University, where he holds appointments in the Yale School of the Environment, the Divinity School, and the Department of Religious Studies.

https://en.wikipedia.org/wiki/John_Allen_Grim

Grim trigger

In game theory, grim trigger (also called the grim strategy or just grim) is a trigger strategy for a repeated game.

https://en.wikipedia.org/wiki/Grim_trigger

Wikipedia

Grim trigger

In game theory, grim trigger (also called the grim strategy or just grim) is a trigger strategy for a repeated game.

Initially, a player using grim trigger will cooperate, but as soon as the opponent defects (thus satisfying the trigger condition), the player using grim trigger will defect for the remainder of the iterated game. Since a single defect by the opponent triggers defection forever, grim trigger is the most strictly unforgiving of strategies in an iterated game.

In Robert Axelrod's book The Evolution of Cooperation, grim trigger is called "Friedman", for a 1971 paper by James Friedman, which uses the concept.

https://en.wikipedia.org/wiki/Grim trigger

Examples of use of grim-visaged

1. The grim–visaged veep put it plainly÷ Such legislation would "restrict the President‘s authority" to conduct the terror war as he sees fit, and thus cannot be tolerated.

2. Grim–visaged bores: The Puritan menace, depicted here by Yeames as Cromwell‘s men interrogate a Royalist‘s son in his painting ‘When Did You Last See Your Father?‘, thought little of banning all Christmas festivities And the ban was no idle gesture.