LR Problem Set #1, Q: 11

[Dave Killoran]

There's a longer discussion of this question over at: viewtopic.php?f=704&t=3884.

Eric makes a great explanation of this there:

The phrase "all that is needed" is a tricky one. It includes a sufficient term, "all", as well as a necessary term, "needed." But if you take a step back and think about what that phrase really means, it really equates to "enough" or "sufficient. The other trick is that phrase is modifying "stop deforestation" NOT "save the koala." So here:

"All that is needed to save the koala is to stop deforestation"

is like saying:

"Stopping deforestation is sufficient to save the koala."

So that rule would be diagrammed:

Stop deforestation Save Koala

I'm going to consolidate all this info over there, so for now I'll close this thread to future comments, and all questions going forward on this tough question can be posted over at: viewtopic.php?f=704&t=3884


Thanks!