This asks to weaken the geologist's argument. I cannot wrap my head around why D is the correct answer. Someone please help!
https://7sage.com/lsat_explanations/lsat-74-section-1-question-23/
So I work on this question. It takes "otherwise" as indicator for bicondition. I wonder which course JY mention about "otherwise"
https://7sage.com/lsat_explanations/lsat-26-section-3-question-22/
... are required to obtain PT 39 and 40. These two tests ... other people just skipped PT 39 and 40 in the curriculum ... I need, just not PT 39 and 40 :-(