Logical ReasoningDifficulty: Hard

PT119 S4 Q21 Explanation

Pizzerias are the only restaurants

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsSufficient Assumption

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Stimulus

Pizzerias are the only restaurants that routinely record the names, addresses, and menu selections of their customers. Simply by organizing these data, they can easily identify regular, average, and infrequent customers. effectively than do other restaurants.

What this question is testing

Sufficient Assumption

Your task

Find the assumption that, if added, guarantees the conclusion follows.

Common trap

Answers that only partly bridge the gap, leaving the conclusion unproven.

Winning move

Identify the new term in the conclusion and pick the choice that links it to the evidence.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
21.

Which one of the following, if assumed, enables the argument’s conclusion to

Answer choices

  1. Unrelated to Goal8% picked this

    Restaurants other than pizzerias cannot easily identify regular, average, and

    This establishes that the 2nd sentence is also something distinct about pizzerias. But since this answer doesn't contain the wording "utilize direct-mail more effectively" (and neither did the evidence), there's no way to combine this with the evidence and derive that pizzerias "utilize direct-mail more effectively. If I'm trying to prove A = Z, you can give me lots of fun facts about A, like A = B, and B = C, and C = D. But if I don't have any facts about Z, I'll never be able to derive that A = Z.

  2. Too Weak10% picked this

    For restaurants, utilizing direct-mail marketing requires the names, addresses, and menu selections of at

    This doesn't give us a rule that says, "If xyz is true, then you utilize direct-mail marketing more effectively". But at least it does talk about utilizing direct-mail marketing. If this answer allowed us to prove that other restaurants don't utilize direct-mail marketing at all, then maybe we could prove that Pizzerias utilize it more effectively (but we were never actually told that Pizzerias utilize direct-mail marketing either). Regardless, this answer does not allow us to say that other restaurants do not utilize direct-mail marketing. We know that all non-pizzeria restaurants fail to routinely record the names / addresses / menu selections of their customers. But it's still possible that sometimes they do, so we can't trigger this rule and derive that other restaurants don't use direct-mail marketing at all.

  3. Unrelated to Goal2% picked this

    For restaurants, the identification of regular, average, and infrequent customers generally involves recording the names, addresses, and menu selections

    This establishes that the 2nd sentence is related to the 1st one (which we pretty much already knew). And more importantly, this answer doesn't contain the wording "utilize direct-mail more effectively", so it's functionally useless to us.

  4. Unrelated to Goal10% picked this

    Utilizing direct-mail marketing is rarely beneficial for restaurants that cannot identify regular, average,

    This answer doesn't contain the wording "utilize direct-mail more effectively", so it wouldn't allow us to derive that wording in our conclusion. If we knew that other restaurants "cannot identify regular / average / infrequent" customers, then this answer would allow us to say that utilizing direct-mail marketing is rarely beneficial for them. But, (A) we don't know that. These other restaurants might be able to identify regular / avg / infrequent customers. (B) establishing that direct-mail marketing is rarely beneficial for them is not the same as proving that they use direct-mail marketing less effectively.

  5. Correct70% picked this

    Restaurants that routinely record names, addresses, and menu selections of their customers always utilize direct-mail marketing more effectively

    Why this is right

    This was the only answer choice to actually have the New Term in the conclusion which we knew we needed (utilize direct-mail more effectively). This is a rule that says if you routinely record then you utilize names / addresses / menu ? direct mail selections of customers marketing more effectively than other restaurants We know that the trigger applies to Pizzerias, so according to this rule "Pizzerias utilize direct mail marketing more effectively than do other restaurants". Thus, this answer choice added to our existing evidence allows us to derive the conclusion.

    Skill tested: Sufficient Assumption · how this choice captures the argument's function is the move to repeat next time.

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