The 180: the LSAT answer that says the exact reverse

A 180 states the reverse of what the question wanted. It is called that because it points a hundred and eighty degrees the wrong way, and it is one of the most effective traps on the exam for a reason that has nothing to do with difficulty.

Why it works

A 180 is built from the passage's own vocabulary and is about exactly the right thing. Every content word matches. Under time pressure, recognizing the right subject matter feels like recognizing the right answer, and the direction is a single word buried in a sentence you have already decided is relevant.

That is why 180s are missed most by people going fast and by people who are certain. Confidence and speed are the exact conditions in which a familiar-looking sentence gets picked without its direction being checked.

Strengthen and Weaken are where it hurts

These questions come in pairs that look identical except for one word in the stem, and a strong weakener is a perfect trap on a Strengthen question. It is powerful, it is clearly relevant, and it does the opposite of what was asked.

The defense is mechanical: before reading the answers, say out loud which direction you are going. "I want this argument to look worse." It takes a second and it is the single highest-return habit on these two types, because the trap is not in the answers — it is in having forgotten the question.

The conditional version

180s also appear as reversed conditionals. If A then B, and the answer says if B then A. Same idea, same words, opposite logical direction — and it is valid-looking enough that it needs the contrapositive to be ruled out rather than intuition.

• Restate the question stem in your own words before reading choices — the fix for most 180s.
• Circle the direction word in the stem: strengthen, weaken, undermine, support, EXCEPT.
• Watch for EXCEPT and LEAST, which invert everything and are the highest-risk stems on the section.
• On conditionals, write the contrapositive rather than reasoning about the flip in your head.
• When two answers both look strong and opposite, one of them is the 180 — and that is a reliable signal you have the right pair.