If you playing a game in which the rest of the players are relying on your judgment for making decisions in conterversal situations and different sticking points, you can if help somebody who is having a bud run at the cards and his losing continuously by making a call in his favor, the reason being that this will help him stay in the game otherwise he may get discouraged and leave the game. Naturally you will only do this if it is more important to keep the losing player in the game financially then it is to make all rules fair and non discriminatory.