In essence, the test is to see whether there is any infirmity in the decision-making process and not in the decision itself. The court has to find out if the administrator has left out relevant factors or taken into account irrelevant factors. The decision of the administrator must have been within the four corners of the law, and not one which no sensible person could have reasonably arrived at, having regard to the above principles, and must have been a bona fide one. The decision could be one of many choices open to the authority but it was for that authority to decide upon the choice and not for the court to substitute its view