Since there is no survival value in an animal's having an organ that is able to function when all its other organs ha...

I found this video and the explanations to be super helpful. For Example 4, I was able to come to pinpoint the main point and come to the correct answer. However, generally, I have difficulty pinpointing premises. So for this question, main point set aside, we have: "Saying something that is false can never be other than morally wrong, and there had been no such accident-Mark had simply forgotten all about the party." Is this all one big premise, or a bunch of little premises? Does it even matter here? Any tips to easily identify the premises going forward? Thanks!