Many homeowners regularly add

Answer choices

1. A

   Too Strong: no fertilizer2% picked this

   There is no single fertilizer that provides both the macronutrients and micronutrients necessary for maintaining

   There's no widely available commercial fertilizer that has both. But there might be some narrowly available professional / scientific / government fertilizer that does both.

   2%
2. B

   Too Strong2% picked this

   The macronutrients nitrogen, phosphorus, and potassium are available to homeowners only

   Too Strong: only Only One Mentioned ? Only One Just because Nitrogen, Phosphorus, and Potassium are the only macronutrients in commercial fertilizers doesn't mean that we can say that Nitrogen, Phosphorus, and Potassium are only found in commercial fertilizers. (It should make us nervous when we're picking an answer that sounds like a rephrasing of one of the facts, since the correct answer almost always fuses multiple facts together)

   2%
3. C

   Correct71% picked this

   Widely available commercial fertilizers are not alone sufficient to maintain a healthy balance of nutrients in soil for lawns where grass clippings are not

   Why this is right

   This is similar to the prediction of, "These fertilizer users better not be raking up their clippings". We can more formally look at the conditional/causal logic of it all. First we have to accept that there's a binary between picking (raking) up clippings vs. not picking them up, leaving them to decay and return to the soil. Where can be a sufficient condition, so this is saying "If grass clippings aren't allowed to decay", which is the same as "If clippings are raked up". Clipping micro healthy soil raked up ? nutrients ? not get depleted maintained Since widely available commercial fertilizers don't put any micronutrients into the soil, they have no power to stop this causal chain. We could have just as easily said "Hot dogs are not alone sufficient to maintain a healthy balance of nutrients where clippings get raked up", assuming hot dogs don't put micronutrients into the soil.

   Skill tested: Must be True · how this choice captures the argument's function is the move to repeat next time.

   71%
4. D

   Too Strong: requires commercial F's20% picked this

   For soil to remain healthy in the long term, it requires the regular addition of both commercial fertilizers and a source of micronutrients such

   Healthy soil requires micro and macro nutrients. Is the only way to get micro and macro nutrients combining commercial fertilizers and grass clippings? No, similar to (A), there might be a single fertilizer that can do it all by itself (a noncommercial one). Or maybe we could use bat poop instead of commercial fertilizer. As long as there might be other sources of macronutrients besides commercial fertilizers, we don't need to use commercial fertilizers to get healthy soil.

   20%
5. E

   Too Strong: unable5% picked this

   Homeowners who rake up their grass clippings are unable to maintain the long-term health of the soil in

   Those who rake up clippings are definitely doing something disadvantageous to the long term health of their soil, but they could potentially make up for that by treating their soil in some other way that provides it with micronutrients.

   5%