The author uses the word "immediacy" (line 39) most likely in order to express

BenMingov on May 28, 2020

Hi Yemisi, thanks for the question.

Sufficient and necessary conditions look like this:

A -> B

A being sufficient, B being necessary. If we have A then we know we have B. B is required for A.

This type of logic occurs in many logical reasoning questions and in logic games. We use these to make transitive chains and make deductions.

Sufficient and Necessary assumptions are additional premises to arguments that play different roles from each other. Sufficient assumption guarantee the validity of the argument. If added to the argument, the sufficient condition makes it bulletproof. Necessary assumptions are premises that are needed in order for the argument to hold. E.g. Wayne Gretzky is a great hockey player. A necessary assumption would be that he knows how to skate. Otherwise, the argument would not hold.

I hope this helps! Please let me know if you have any other questions.

Yemisi on May 29, 2020

Thank you for your response and yes it helps. But i have another question.
What is the difference between Main Point Questions and Main Conclusion Questions.
Its always confusing when am dealing with such questions.