Normal full-term babies are all born with certain instinctive reflexes that disappear by the age of two months. Becau...

Sola January 14, 2021

Chain

Since there was a word "all", which is a sufficient indicator, I thought this should be "Instinctive reflexes-> NFT babies". How do I figure out when and when not to identify these indicators as N and S?

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shunhe January 15, 2021

Hi @Sola,

Thanks for the question! So it helps sometimes to rephrase the sentence a little and it’ll make more sense. Is the sentence saying that All babies born with certain instinctive reflexes that disappear by the age of two months are normal full-term babies? No, it’s not, it’s saying the opposite. It’s saying that all normal full-term babies are born with certain instinctive reflexes that disappear by the age of two months. And that’s how you get to

NFT —> IR

So don’t just blindly see “IR” after “all” and diagram, think about what the “all” is really referring to.

Hope this helps! Feel free to ask any other questions that you might have.

johndan1234 April 11, 2021

I notice that you did not write out the Contrapositive in your analysis of questions A, B, C, or D, but you used the CP to determine the correct answer choice. How is that? How do you decide when to use and when not to use the CP? Please, please advise!