54 LR Two Question 25
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Hey Dave,
I got a questions that's been bugging me for a while.
Sufficient -> Necessary
sufficient indicates that necc must occur and necc is required for suff to occur.
That being said is there a quick way to identify which part is suff and which part is necc? As of right now i have to think about it before deciding which one is suff and necc and sometimes i get it wrong.
For example, the first sentence can be viewed as D -> E and S, but for the second sentence receiving a free soft drink could be a suff in my mind since free soft drink would indicate either entree or salad. Do you know why i'm confused or see what i'm missing?
Thanks for answering all my questions Dave.

Well, it's hard for me to know why you're conflating the two, but I do have a solution for you. A strict adherence to the methods put forth starting here will—if followed—result in consistently correct conditional symbolization.
Add to that the ideas expressed here and here, and remember that the sufficiency is always on the left and the neccessity is always after the arrow (the Requirement goes on the Right, as I've put it elsewhere on this site), and you'll keep your work correct and efficient!