Cannot Be True Questions - - Question 19

If one of the effects of a genetic mutation makes a substantial contribution to the survival of the species, then, an...

Bluebell7612 May 29, 2019

Diagraming then and only then

In this question, I diagramed the first sentence like this Scs==>Mfns = Not Mfns===> Not Scs But in Naz's explanation, she did Not Scs===> not Mfns Is that not an illegal negation, or is then an only then diagramed like if and only if?

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Ravi May 29, 2019

@Blueball7612,

Great question. Then and only then can be treated like diagramming an
if and only if statement.

SC< - >Favored

Hope this helps. Let us know if you have any more questions!

mystah September 17, 2021

I was wondering if there's a "preferred" method of diagramming lengthy conditional statements. In the videos, it looks very easier; however, the words that I choose never seem to be the same as the instructors. Are there any tips that you can provide on which part of these statements should be emphasized?

mystah October 5, 2021

Thanks so much. I see it now

Ravi February 7, 2022

@mystah, whatever works for you is best. I recommend choosing words, phrases, or acronyms that are as short as possible while conveying all forms the relevant information. As long as you know what you're writing down stands for and can keep track of it, that's what counts.

Ravi February 7, 2022

@mystah, whatever works for you is best. I recommend choosing words, phrases, or acronyms that are as short as possible while conveying all forms the relevant information. As long as you know what you're writing down stands for and can keep track of it, that's what counts.