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May 0608:30 AM PDT
-09:30 AM PDT
In Episode 3 of our GMAT Ninja Critical Reasoning series, we tackle Discrepancy, Paradox, and Explain an Oddity questions. You know the feeling: the passage gives you two facts that seem completely contradictory....- May 08
08:00 AM PDT
-08:30 AM PDT
Join the special YouTube live-stream for selecting the winners of GMAT Club MBA Scholarships sponsored by Juno live. Watch who gets these coveted MBA scholarships offered by GMAT Club and Juno.
30 Apr 2026, 06:08
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N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
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Question Stats:
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Assumption question
How to Pre-think
Question - Only engineering is capable of analyzing the nature of a machine in terms of the successful working of the whole; physics and chemistry determine the material conditions necessary for this success, but cannot express the notion of purpose. Similarly, only physiology can analyze the nature of an organism in terms of organs' roles in the body's healthy functioning. Physics and chemistry cannot ascertain by themselves any of these operational principles. Which one of the following is an assumption required by the analogy?
Link to LSAT Only engineering is capable of analyzing the nature of a machine in : Critical Reasoning (CR)
Prethinking strategy
You read:
Wrong task.
🔴 WHAT YOU SHOULD DO INSTEAD (MECHANICAL)
The moment you see “Similarly”:
Trigger this immediately:
Answer (C) The notion of purpose used by engineers to judge the success of machinery has an analog in organisms.
Question 2
Editorial: The city has chosen a contractor to upgrade the heating systems in public buildings. Only 40 percent of the technicians employed by this contractor are certified by the Heating Technicians Association. So the city selected a contractor 60 percent of whose technicians are unqualified, which is an outrage.
Which one of the following is an assumption required by the argument in the editorial?
Editorial: The city has chosen a contractor to upgrade the heating... : Critical Reasoning (CR)
Prethinking strategy
🔴 WHY YOU WENT BLANK
You read like this:
👉 That’s wrong for CR.
CR needs:
🔴 WHAT YOU SHOULD DO INSTEAD (MECHANICAL)
Don’t think. Just run this trigger:
Step 1: Circle the % statement
→ “40% certified”
Step 2: Jump to conclusion word
→ “60% unqualified”
Step 3: Ask ONLY this:
How to Pre-think
Question - Only engineering is capable of analyzing the nature of a machine in terms of the successful working of the whole; physics and chemistry determine the material conditions necessary for this success, but cannot express the notion of purpose. Similarly, only physiology can analyze the nature of an organism in terms of organs' roles in the body's healthy functioning. Physics and chemistry cannot ascertain by themselves any of these operational principles. Which one of the following is an assumption required by the analogy?
Link to LSAT Only engineering is capable of analyzing the nature of a machine in : Critical Reasoning (CR)
Prethinking strategy
You read:
Quote:
Your brain tried to process content → overload → blank.
Wrong task.
🔴 WHAT YOU SHOULD DO INSTEAD (MECHANICAL)
The moment you see “Similarly”:
Trigger this immediately:
Quote:
Answer (C) The notion of purpose used by engineers to judge the success of machinery has an analog in organisms.
Question 2
Editorial: The city has chosen a contractor to upgrade the heating systems in public buildings. Only 40 percent of the technicians employed by this contractor are certified by the Heating Technicians Association. So the city selected a contractor 60 percent of whose technicians are unqualified, which is an outrage.
Which one of the following is an assumption required by the argument in the editorial?
Editorial: The city has chosen a contractor to upgrade the heating... : Critical Reasoning (CR)
Prethinking strategy
🔴 WHY YOU WENT BLANK
You read like this:
Quote:
Your brain tried to understand the situation.
👉 That’s wrong for CR.
CR needs:
Quote:
🔴 WHAT YOU SHOULD DO INSTEAD (MECHANICAL)
Don’t think. Just run this trigger:
Step 1: Circle the % statement
→ “40% certified”
Step 2: Jump to conclusion word
→ “60% unqualified”
Step 3: Ask ONLY this:
Quote:
30 Apr 2026, 23:30
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Further notes on assumption
Paleontologists had long supposed that the dinosaur Diplodocus browsed for high-growing vegetation such as treetop leaves by raising its very long neck. But now computer models have shown that the structure of Diplodocus’s neck bones would have prevented such movement. The neck could, however, bend downward and even extend below ground level, allowing Diplodocus to access underwater vegetation from dry land. Thus, Diplodocus must have fed on plants on or near the ground, or underwater.
Which one of the following is an assumption required by the argument?
Link : https://gmatclub.com/forum/paleontologi ... 52413.html
👉 You’re thinking:
“Shouldn’t I prove it fed low instead of worrying about high access?”
Here’s the correction:
🔴 KEY LOGIC YOU MISSED
The conclusion is exclusive:
👉 “Diplodocus must have fed on low/underwater plants”
That implicitly means:
👉 It did NOT feed on high vegetation
⚡ So what must be true?
To prove:
👉 “ONLY low feeding happened”
You must ensure:
👉 High feeding was impossible in ALL ways
👉 If conclusion says “must be X” → eliminate all non-X possibilities
🧠 Exam trigger
Whenever you see:
👉 “must / only / therefore X”
Ask:
👉 “What other possibility must be killed?”
That’s your assumption.
Paleontologists had long supposed that the dinosaur Diplodocus browsed for high-growing vegetation such as treetop leaves by raising its very long neck. But now computer models have shown that the structure of Diplodocus’s neck bones would have prevented such movement. The neck could, however, bend downward and even extend below ground level, allowing Diplodocus to access underwater vegetation from dry land. Thus, Diplodocus must have fed on plants on or near the ground, or underwater.
Which one of the following is an assumption required by the argument?
Link : https://gmatclub.com/forum/paleontologi ... 52413.html
👉 You’re thinking:
“Shouldn’t I prove it fed low instead of worrying about high access?”
Here’s the correction:
🔴 KEY LOGIC YOU MISSED
The conclusion is exclusive:
👉 “Diplodocus must have fed on low/underwater plants”
That implicitly means:
👉 It did NOT feed on high vegetation
To prove:
👉 “ONLY low feeding happened”
You must ensure:
👉 High feeding was impossible in ALL ways
🧠 Exam trigger
Whenever you see:
👉 “must / only / therefore X”
Ask:
👉 “What other possibility must be killed?”
That’s your assumption.
04 May 2026, 04:16
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Physics and chemistry cannot ascertain by themselves any of these operational principles.
