According to the rules, the amount of sanity you have to lose in one game "day" in order to be "indefinitely insane" is one-fifth of the current sanity . Not one-fifth of Power, not one-fifth of maximum sanity, but one-fifth of current sanity . (Page 156 of the 7E Keeper's book). The sheet may be working as expected, but it's not correct. The value for "indefinite sanity" does not properly change when the current sanity changes. TheMarkus1204 said: Test it yourself. Turn Edit Mode on and edit the Max Sanity field (the right one which you cannot edit anymore once edit mode is turned off). It will show 19 there (which equals 95 Max Sanity because in Cthulhu everything is rounded off). According to the Rules, Max Sanity equals 99 - Cthulhy Myth. However the Value for Indef. Insanity is one fifth of the Power Value, which also is the Starting Value for Sanity... So MAYBE it'd be better to use the POWER Value for calculating the Indef. Insanity instead of the Sanity Points... In Both given Examples are no errors. The sheet works as expected. Saul J. said: Huh? In the example given, the sanity is 80. The indefinite insanity is 16. That is correct - it's one-fifth of the current sanity - that's how much the player would have to lose in one day to be indefinitely insane. It's got nothing to do with maximum sanity. TheMarkus1204 said: It is. BUT normally, MAX Sanity is 99-Cthulhu Myth. You cannot put that in there as the MAX Value is used to calculate the Indef. Insanity which is wrong! Saul J. said: Isn't this the "correct" behavior though? It's showing how much damage you have to take to get a major wound, and how much sanity you have to lose to become indefinitely insane. Kelly W. said: Here is just two examples