For the Following, Try to Come Up with an Additional

Essay

For the following, try to come up with an additional premise that will turn the passage into a deductively valid or an inductively strong argument. Usually this requires adding a general moral principle and, sometimes, an extra nonmoral claim as well. The idea is to guarantee that the "ought" claim follows from the "is" claim.
"You shouldn't have criticized David so harshly; his mistake was a trivial one."