>>>We can conclude that John Kerry's intial discharge was Less Than Honorable
Without knowing what it really was, all we can say for certain is that sKerry's discharge was something "Other than Honorable"
From what I gather, there are 5 classes of Discharge: Honorable, General, Other Than Honorable, Bad Conduct, and Dishonorable.
Since the review board upgraded him to "Honorable", his initial discharge had to be less than Honorable.