@KatiaMiles I would be interested in joining!

@Disney Hmm I think the phrasing we would need to make it am airtight valid argument would be: Most of America's almonds are grown in California. All of California's produce is exported to Brazil. Therefore, some of America's almonds are exported to Brazil. This would follow Formal Argument #5, "most before all." That way, it is a guarantee that at least some of America's almonds are exported to Brazil.

I do think your proposed answer would still make a valid argument though. If America produced 10 almonds, and 6 of them were grown in California, and most of America's almonds are exported to Brazil, at least one almond grown in California will end up in Brazil. I'm really curious to see what a 7Sage tutor has to say about this, because your example is really throwing me LOL (because I think it's valid).

This made more sense when I remembered the question from the last skill builder:

"All surgeons enjoy the sight of blood. Most vampires enjoy the sight of blood."

I had incorrectly inferred that the "shared" concept of enjoying the sight of blood meant that the other groups (surgeons and vampires) also had overlap, and concluded that "Some surgeons are vampires."

That was wrong-- just because something enjoys the sight of blood, it does not mean they are either a surgeon, a vampire, or both. Enjoying the sight of blood is not necessary to be a surgeon or vampire.

@TeneishaCraighead No, "unless" is Group 3, where you negate an idea and make that the sufficient condition. You also have to note that "No one can venture into Mordor" essentially functions like /(Mordor) because of the language "no one", so negating that would be //(Mordor), and two negations cancel out, so negating the idea of "No one can venture into Mordor" would make it so "One can venture into Mordor."

With that in mind, let's say the idea we choose to negate is "No one can venture into Mordor." That makes it "One can venture into Mordor" like we established above. So it would translate to: If one can venture into Mordor, then they are brave.

Conversely, if we choose to negate the idea "they are brave," it makes it so "they are not brave."

If they are not brave, they can not venture into Mordor.