This is amazing! It looks overwhelming right now as an overview but I'm sure once we get through the LR curriculum, it will be a very helpful quick reference sheet. Thanks 7Sage!!

Can the negated version "Anywhere from none to exactly half of A are B" be two conditional relationships joined by the exclusive "or"? (or the inclusive and/or, we just know that the "and" situation wouldn't happen because you can't have some and none together)

Each relationship:

Some A are B: A ←s→ B

No A are B: A → /B

Together:

(A ←s→ B ) or (A → /B)

Could this be valuable in some circumstances? Maybe to find the broken down possibilities in an answer choice?

For Answer C, when we come across "at least one", do we just read it as "must be true", since that would encompass "at least one"?

Like others, I also am not clear on Question 1

I would have thought:

Premise:

- decomposition is slower in cool climates

Main premise / sub-conclusion: [this is a given truth but the premise provides some, albeit weak, support]

- the technique can be used to obtain accurate dates for sites almost a million years old in cooler regions.

Conclusion: [albeit needing an assumption that places such as southern Africa are cool]

- Measurements of the extent of amino acid decomposition in fragments of eggshell found at archaeological sites in such places as southern Africa can be used to obtain accurate dates for sites up to 200,000 years [which is within a million years]