.png)
LSAT strengthen questions ask which new fact would make the conclusion more likely, not certain. Recognize them from if true, most strengthens or most supports the argument. Solve them by finding the argument's weakest link first, then choosing the answer that reinforces that specific link.
Recognition is the cheapest point on the section. Every strengthen question announces itself in the stem, and the stems recycle a small number of formulations. Learn them and you stop spending seconds deciding what you are being asked.
Stem wordingWhat it tells youWhich one of the following, if true, most strengthens the argument?The standard stem. If true means take the choice as given.Which one of the following, if true, most supports the conclusion drawn above?Supports the conclusion, same task.Which one of the following, if true, provides the most support for the argument?Provides support, same task.Which one of the following, if true, would most help to justify the reasoning above?Justify here means bolster, not prove.
Read the stem before the stimulus. Knowing you are hunting gap you were meant to close changes what you notice on the first read, and reading the stimulus cold means reading it twice.
Three steps, in this order. The order is the method, because the most common way to lose this question type is to read the answer choices before you have decided what you are looking for.
StepWhat it means in practiceLocate the conclusion and ask what could still go wrongStrengthening is targeted repair. Before you read the choices, name the specific doubt a reasonable skeptic would raise. That doubt is what the correct answer will address.Prefer answers that rule out an alternative explanationOn causal arguments in particular, the highest-value strengthener usually eliminates a competing cause or confirms that the proposed cause and the effect really do travel together.Test degree, not direction, at the endTwo choices will often point the right way. Pick the one that closes more of the gap you named, and be suspicious of a choice that merely repeats a premise in new clothing.
The stimulus and answer choices below were written for this page. They are not taken, adapted or paraphrased from any real LSAT question, because reproducing licensed test content is not something we do. The style is the target; the content is ours.
Stimulus.
Archaeologists working at the Kestrel Ridge settlement recovered dozens of obsidian tools. The nearest obsidian deposit lies 300 kilometres away. The archaeologists concluded that the people of Kestrel Ridge traded with communities near that deposit.
Question. Which one of the following, if true, most strengthens the archaeologists' conclusion?
(A) Chemical analysis matched the tools' obsidian to that deposit, and ornaments made from shells found only near the deposit turned up in the same soil layer
(B) Obsidian tools have been recovered at many settlements throughout the wider region
(C) The people of Kestrel Ridge also made tools from chert quarried within a few kilometres of the settlement
(D) Obsidian can be carried over long distances without significant damage
(E) Some communities living near the obsidian deposit are known not to have traded with distant settlements
The answer is (A).
The gap is that obsidian at the site does not by itself establish trade. It could have been carried by a migrating group, taken in a raid, or scavenged. Choice A ties the material to that specific deposit and adds a second class of goods travelling the same route, which is what exchange looks like archaeologically and what one-off transport does not.
Reviewing the four wrong answers is worth more than confirming the right one. Each was engineered to catch a specific misreading, and naming that misreading is what stops it recurring.
ChoiceWhy it failsBWidespread obsidian makes the Kestrel Ridge finds less distinctive, not more probative of trade with that particular source.CLocal toolmaking is compatible with trade and with its absence. It does not move the conclusion in either direction.DEstablishes only that the transport was possible. Possibility is the floor the argument already assumed, so this adds almost nothing.EPoints the other way. If nearby communities did not trade at distance, trade with them becomes less likely.
Across strengthen questions, the wrong answers fall into recurring shapes. Once you can name the shape you can eliminate on sight instead of arguing with each choice on its merits.
TrapHow it worksThe possibility answerSays the mechanism could happen. Could is nearly always too weak to be the strongest strengthener.The premise echoRestates evidence already given. New support has to be new.The wrong-conclusion strengthenerSupports a claim the argument did not make, often a broader or narrower version of it.The quiet weakenerReads as relevant and, on inspection, makes the conclusion less likely. Always check the direction before the degree.
One question people always ask about strengthen questions is how many appear per test. There is no honest answer to give. LSAC does not publish how many questions of each type appear on a given test, and no honest page can give you a percentage without inventing it.
What is published is the scored structure: the LSAT is two scored Logical Reasoning sections and one scored Reading Comprehension section, four 35-minute sections in total including one unscored variable section, with a 10-minute intermission after section two, per LSAC's own test specifications (https://www.lsac.org/lsat/register-lsat/accommodations/specifications-lsat-and-lsat-argumentative-writing). Two of the three scored sections are Logical Reasoning, so LR carries roughly two thirds of your scored questions.
That ratio is worth planning around. A per-type count is not, because nobody outside LSAC has one.
That matters practically, because study plans built on invented percentages allocate your weeks wrong. If you read that strengthen questions are eleven percent of the test, ask where the number came from. It came from somebody counting a handful of released tests and rounding, which is not the same thing as a published specification.
Plan on the structure instead. Two of your three scored sections are Logical Reasoning, strengthen questions appear in both, and no single LR type is rare enough to skip or common enough to carry your score by itself.
Drilling strengthen questions in a block is efficient for learning the pattern and misleading about whether you have learned it. Blocked practice lets you know the question type before you read the stimulus, which is exactly the cue the real test removes.
The size of that gap is measured. In a classroom study of 787 students across 54 classrooms, interleaved practice produced 61 percent correct against 38 percent for blocked practice at a 33-day delay, an effect of d = 0.83, per Rohrer, Dedrick and Hartwig (2019), Journal of Educational Psychology (https://gwern.net/doc/psychology/spaced-repetition/2019-rohrer.pdf). Blocked practice felt better and tested worse.
The same reversal shows up in how students judge their own learning. Kornell and Bjork (2008), Psychological Science (https://gwern.net/doc/psychology/spaced-repetition/2008-kornell.pdf) found 78 percent of students judged massed study as good as or better than spaced study while 78 percent actually performed better spaced. Your sense that a drill block is working is not evidence that it is.
So use blocks to build the recognition, then stop. Once you can name a strengthen question from the stem without thinking, the questions belong back in mixed sets where you have to identify the type yourself, because identifying it is half the skill.
Review is where the points are, and review is not reading the explanation for the answer you missed. The intervention research is blunt about this: across 28 studies and more than 16,000 participants, test prep as a category produced an overall effect of g = .26, and practice tests on their own produced g = .19 at p = .233, which is not statistically significant, per Hao and colleagues (2025), Review of Educational Research (https://journals.sagepub.com/doi/10.3102/00346543251360775). Taking questions is not the active ingredient.
What did work in that same Hao and colleagues analysis was structured practice on the reasoning: workbooks at g = .40 and explicitly teaching test-taking skills at g = .35. And there was no dose response at all, with neither contact hours at p = .489 nor program length in weeks at p = .314 predicting outcomes.
More hours is not the lever. Better review is.
Concretely, for every strengthen question you get wrong, write three lines before you look at any explanation: what you thought the gap you were meant to close was, what it actually was, and the exact word in the stimulus that would have told you. The third line is the one that transfers.
Then leave the question alone for at least a day before you revisit it. Testing yourself beats restudying at g = 0.50 across 61 studies, the advantage rises to g = 0.69 when the delay is a day or more against g = 0.41 under a day, and feedback roughly doubles the effect at g = 0.73 with against g = 0.39 without, per Rowland (2014), Psychological Bulletin (https://pubmed.ncbi.nlm.nih.gov/25150680/).
Every LSAC figure on this page was taken from LSAC's own pages and last checked on July 26, 2026. Prices, dates and policies move without notice, so the source link sits next to each number rather than in a bibliography at the bottom.
Where LSAC has not published something, this page says so in those words rather than filling the hole with a plausible number. That is the difference between a gap and a guess, and only one of them is safe to plan around.
The pairing of if true with strengthens, supports, or provides support. If true tells you to accept the new fact and ask only what it does to the argument.
Name the specific doubt a skeptic would raise about the conclusion, then find the choice that answers that doubt. On causal arguments, ruling out an alternative cause is usually the strongest move.
There is no published per-type count from LSAC. What is published is the scored structure, two Logical Reasoning sections and one Reading Comprehension section, per LSAC's specifications.
No. Strengthen questions ask for more likely, not certain. A choice that merely raises the probability can be correct, and a choice that proves too much is often out of scope.
Sufficient assumption demands validity, so the answer must close the gap completely. Strengthen only asks for improvement, so partial help can win.
Written by Ali, Georgetown Law, founder of Lovare Institut.
August 5, 2026
August 5, 2026