Researcher: Newly formed neurons

Answer choices

1. A

   Out of Scope2% picked this

   Newly formed neurons sometimes develop into midsized spiny neurons in areas of the brain other

   Out of Scope: other than the striatum We have no idea if newly formed neurons do become midsized spiny neurons anywhere. It's possible they just never become midsized spiny neurons. This answer is trying to trap people into thinking that "the opposite of what we said applies in other contexts". Like if the passage said, "Jane is very polite at church", this answer would be baiting people into thinking, "so does that mean Jane is very impolite when she's not at church"? That's never a legal inference. We can affirm that "black lives matter" without implying that "non-black lives don't matter".

   2%
2. B

   Out of Scope: shortly after injury3% picked this

   Newly formed neurons are commonly found in injured areas of the brain shortly after

   We don't have any time-sensitive information about when newly formed neurons come on the scene. This is Must Be True, so we can't fabricate or speculate. We're just trying to derive truisms based on what we were told.

   3%
3. C

   Too Strong3% picked this

   Midsized spiny neurons are not the most common type of neuron in any part of the brain

   Too Strong: any part Out of Scope: outside striatum Just like (A), we have no information whatsoever about what goes on outside the striatum. Just because midsized spiny are the most common within the striatum doesn't mean that the opposite is true outside the striatum. Just because Jane is polite at church doesn't mean she's impolite when she's not at church. She might just be polite!

   3%
4. D

   Correct91% picked this

   In cases of injury to the striatum, newly formed neurons will not help to

   Why this is right

   As we predicted, by applying the conditional rule in the first sentence to the facts provided in the second sentence, we can derive that newly formed neurons won't help to heal an injury to the striatum. Newly formed neurons only help heal if they match the most common local type of neuron, and newly formed neurons in the striatum will never match the most common local type of neuron in the striatum.

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

   91%
5. E

   Too Strong: most cases2% picked this

   In most cases of brain injury, newly formed neurons do not help to

   We only know about the case of the striatum. This information doesn't allow us to derive anything about other cases of brain injury.

   2%