I'm confused - do you have to find the contrapositive before swapping "and" for "or" and negating each of the conjuncts? #help

Same. I don't really seeing the point of kicking up into the domain.

#help For Question 3, why isn't "terminal bud on the main stem" the sufficient condition? I viewed it as the sufficient since the terminal bud is a subset of all buds on the main stem.

#help For Question 5, why isn't "21 or older" the necessary condition? It's it necessary for a person to be 21 or older to purchase alcohol legally in the US?

Can someone please explain question 3 to me? This is what I got when doing Lawgic and I'm very confused:

/Bulk-Discounts -> High-Sales -> Popular-Books

I was wondering this, too. I think it's because mixing plant material is not necessary for increasing the number of beneficial soil bacteria - meaning that there are other ways to increase the number of beneficial soil bacteria (for example, you can use a special fertilizer to increase the number of beneficial soil bacteria).

Meanwhile, one must know how to cast the charm if they want to mix the plant material. So mix -> cast charm.

Love this advice!

A bit confused by 4.3. Why is the referent "specialize" and not "free trade"?