The logical reasoning (LR) section is commonly called the arguments section. However, the LSAC descriptor of “logical reasoning” more accurately expresses what this section tests. Although what reasoning is logical as opposed to illogical, or so considered by the LSAT, is not obvious.
On the LR section, some methods of decision-making are allowed whereas all others lead to the wrong answers. There are many ways to pursue decision-making on the wrong basis or through a disallowed process, thereby wasting time and effort. As the LSAT is a timed exam, conserving time and energy is important. And so it is important that only the allowed processes of decision-making are relied on during the LR section.
Most prep courses simply focus on describing what processes are allowed on the LR section, substituting an overview of basic logical operations for an education sensitive to the needs of each student. The average student misses roughly half of the questions on the LR section. This means that they are making systematic errors. These errors, however, often derive from some underlying decision-making process. Identifying this process and helping the student distinguish it from the processes that are allowed on the LSAT is the first step toward achievement on the LR section. This cannot happen in a standard class, which overlooks the needs of the student and leaves them unable to understand what they are doing wrong.
By the way, for those having difficulty with the timing of the LSAT. It is much more difficult — in the sense that it takes much more effort and much more time — to do poorly on the LSAT as opposed to breaking into the 170s. It’s much like in sport. With poor form, you waste energy and miss the target. Same thing is true with the LSAT. If you are struggling with understanding the test, than it can be expected that you would be struggling with the time. However, the second part means absolutely nothing in and of itself. Until a person has an understanding of what they are supposed to be doing, it is impossible to evaluate whether they have issues with time, as their performance is not representative of what they should be doing.