Modifiers not found in stimulus = incorrect answer choice.

Test-replicative time conditions for prep tests, varied/lax time conditions for drills.

An overarching theme for all LR question types I have noticed is that parallel structure between stimulus and correct answer is KEY.

The shape of a marine animal's fin does NOT affect.... which would render the supporting premise of the main conclusion irrelevant.

For many of the questions I get right, I skip the stimulus explanation and focus solely on the answer explanations just to reinforce why they are each right/wrong. However, if I have no doubt whatsoever as to why I got something correct I skip it. My understanding is that the core curriculum is a starting point of learning how to analyze certain types of questions properly. Drilling and practice exams will be where we see the most growth/improvement in our scores. I could be wrong though, these are just my assumptions.

No, I have a video for this lesson.

I'm not your bloody slime and I am not your bloody drilla

I would think of this as ignoring irrelvant information/modifiers rather than making an assumption. Unless it is specifically stated that someone/something doesn't meet a condition (i.e living in a 7 unit building while referencing a 10 unit law) there is no reason to fixate on the unecessary modifier (10 units).

Context is crucial to understanding the argument, but not a part of the argument itself. Context can "agree" with the conclusion in the way that it is relevant in understanding a situation, but not adding any validity to the conclusion.

I think the phrase "universal phenomenon" is what is important here. The words in the premise "many" "various" do not align with "universal" well enough to support the conclusion. Some does not equal all. Thats my take at least.