Pls paraphrasing it Stella and Thomas are classmates. Their academician provides them an assignment to be separately submitted in 4 days. the category is expected to write down an essay on a subject of setting. Knowing that their academician likes sensible presentation, Stella and Thomas commit to add some photos of nature and build their presentation higher so they get some additional credits. They share the work between themselves. Stella agrees to try and do research on-line and collect points for the essay. Thomas, being an honest artist himself, takes up the responsibility of collection pictures from nature around or net. Then they're going to exchange the notes and complete the assignments separately. As there's not abundant time left, they each ought to get to figure right away. Both of them have 2 methods here. Either be honest ANd stik to the agreement or deviate and conceal the most effective a part of their analysis from the opposite so it'll be an exclusive purpose solely in their submission and so every hopes to induce a more robust grade than the opposite. however deviation conjointly ends up in loss of trust of the opposite friend, maybe for all times. If each of them follow the agreement, they each get a payoff of a hundred every (full credit). If they each deviate, their payoff are going to be seventy five every (less than full credit and loss of trust in every other). If one adheres to the agreement and therefore the different deviates, the one who deviates can get a payoff of 125 (full credit and appreciation from academician minus the trust), however the one who adheres can get solely fifty (less than full credit and a way of regret at being betrayed). The best payoff here is for each to come back up with the most effective of each - good points and outstanding photos. however each Stella and Thomas have a dominant strategy to deviate. they're going to not abide by the agreement regardless of the different player will. So, the equilibrium is (Deviate, Deviate) with payoff (75, 75) rather than the higher payoff (100, 100) if each act in step with the agreement. Greed for higher grade makes them act in an exceedingly manner that's detrimental to each of them