Mormons say that when Adam ate from the Tree of Knowledge it was not wrong, but was just a "demotion", like going from one good job to another, less good job. A step down but progressing in a forward direction. Mormons refer to The Fall as a Transgression. For Mormons a sin is the act of doing something contrary to the known will of God and to do so willing with full knowledge. Transgression, on the other hand, is the violation of a law or rule. So for Mormons, all sins (willfully disobedience) are transgressions but not all transgressions (violations) are sins. Since Adam didn’t have knowledge of good and evil before partaking of the forbidden fruit, so his act was a transgression of the law, not a sin against the law.