Day 60 of 168 · Week 10
Day 60 / 168 Week 10 of 28 Phase 2: Logical Reasoning Deep Dive

Week 10 Synthesis: The Principle & Parallel Family

🕑 ~130 min · Archetype C — Synthesis / Timed

Week 10 Synthesis: The Principle & Parallel Family

Principle and Parallel both ask you to abstract away from topic and match on structure or rule — the last of the LR "matching" skills before Week 11 pushes into harder, denser material.

Decision Matrix

TypeWhat's matched
Principle-IdentifyCase → general rule
Principle-ApplyRule → matching case, all conditions satisfied
Parallel ReasoningArgument structure, topic-independent
Parallel FlawStructure AND the specific logical error

Official Timed Section

One drill-tier LR section, timed at 35 minutes, mixed. Blind-review and log — check your timing trend against Days 12, 18, 24, 30, and 36.

Practice items on this page are curriculum-authored in LSAT style; they are not official LSAC questions. Real drilling happens on LawHub — see the assignment below.

Q1. A Parallel Reasoning stimulus draws an invalid conclusion via a mistaken reversal. Should the correct parallel answer also draw a valid or invalid conclusion?

A. Valid — opposite of the stimulus
B. Invalid, and via the same kind of error (a mistaken reversal)
C. It doesn't matter as long as the topic matches
D. The question can't be answered without more information
Correct answer: B. Parallel Reasoning (and especially Parallel Flaw) requires matching validity status and error type, not just surface topic.

Week 11 tackles the hardest material directly: nested conditionals, advanced causal reasoning across question types, and EXCEPT/LEAST stem traps.