The author uses the word "immediacy" (line 39) most likely in order to express
balde_kadija@yahoo.comon June 14, 2022
Missing Premises Drills
I've gotten just about every question in this section wrong and I've watched the S & N video as well as the Missing Premises office hours video. Please, how does one go about finding the missing premises when, after having diagrammed the contrapositives of all you know, you don't have any premise (or contrapositive of the premises) that yields the S of the conclusion? I find that that is where I am mostly getting stuck
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I also don't understand how, when making jumps from a premises to the conclusion in order to fill in the gap between what you know and what you want...how is one supposed to know if the missing premise is supposed to yield the N of the conclusion's positive argument OR the conclusion's contrapositive?? I notice that in some answers, the missing premise makes the jump by connecting it to the positive argument, whereas in others it connects to the contrapositive...but how do we discern between which should actually be used?
jakennedyon June 15, 2022
Hi @balde_kadija@yahoo.com,
To answer your first question, if none of the evidence links properly to one part of the conclusion, the missing premise will have to create that link. So if the sufficient condition of the conclusion is not in any of the evidence, it will be in the answer choice.
As for your second question, you will have no clue whether the correct answer choice will use the contrapositive form or not, so you have to look out for both in the answers.
Tayloron August 30, 2022
Hi @Jacob building on your last point "You will have no clue whether the correct answer choice will use the contrapositive form or not..". When I am completing these questions I am under the impression I need to use the consistent sufficient and necessary set up (i.e. if I use the contrapositive of the provide premise, then the "missing premise" needs to be the contrapositive of the answer) - is this correct?
For example.
P1: A - Y
P2: Missing
P3: B - C
C: Not Y - Not B
So in my mind, I need "Not Y" as a sufficient condition and this only exists in the contrapositive of P1. Therefore the answer of the missing premise for P2 is C-A so that when I use the contrapositive "Not A - Not C" I can connect the contrapositive from P1 to P3 to validate the conclusion.
My confusion comes from doing the missing premise flashcards as both the premise and contrapositive are listed and sometimes they are flipped as in I might need to use P1 as provided, the missing P2 is then written in the answer as if I need to use the contrapositive, then P3 is as provided. That isn't consistent but does it matter? Am I overthinking it?
