I think the contrapositive is /[/e or /d-->/c]-->/[/b-->a]! However, the LSAT will not ask you to diagram such a complex conditional, so don't sweat this!
"Until" is the conditional indicator here. Group 3. The ... E". In other words, the conditional statements (A -> /B) and ... remember how to negate a conditional relationship? You have to negate ...
... ensuring you understand the exact conditional relationship that the argument has ... information. Sentence 1 contains two conditional statements, which can be diagrammed ... that. So having identified the conditional relationship that was botched (Support ...
... look like, with the fixed conditional relationship written in caps lock ... you to pinpoint the exact conditional relationship that was botched. The ...