Critical Logic | Logical Reasoning Aptitude Practice | Kuriloo

Fundamental Principles

Strengthening Factor

Fresh evidence or data that directly supports an argument's core assumption, making its final conclusion much more likely to be true.

Weakening Factor

New information that exposes a flaw, breaks a core assumption, or introduces alternative explanations that challenge the conclusion.

Essential Formulation Tips

When looking for a statement to weaken an argument, treat every option as completely true and focus purely on which choice does the most damage to the author's logic.
Do not waste time trying to prove the initial argument right or wrong. Your goal is simply to measure how new information changes its overall reliability.

Shortcut Execution Techniques

The Paradox Solver: To resolve a paradox or apparent contradiction, find the choice that explains *how* both conflicting facts can be completely true at the same time.

Contextual Inquiries (FAQs)

Q: Does a weakening statement have to completely destroy the argument to be correct?

A: No. It simply needs to reduce the reliability of the conclusion or cast doubt on its main assumptions.

Example Breakdown: Weakening an Economic Claim

Demonstrates advanced evidence evaluation in critical reasoning.

Problem QueryArgument: 'The city should ban ridesharing apps immediately because their lower prices are forcing traditional taxi companies out of business, which will leave residents with fewer transportation choices.' Which new detail most severely weakens this argument?

Step-By-Step Solution Path

Identify the core claim: Banning ridesharing apps is necessary to prevent residents from losing transportation choices.

Look for a flaw or alternative outcome: If ridesharing apps actually expand transport access, the argument's main concern disappears.

Evaluate this new detail: 'Ridesharing apps provide over 50,000 rides per day in neighborhoods that traditional taxis completely refuse to serve.'

This fact proves that banning the apps would actually *hurt* transportation options for many residents, completely reversing the argument's main claim.

Conclusion: This detail successfully weakens the argument.

Analytical Hint: Look for a fact that proves the proposed solution would actually make the original problem worse.

Evidence and Paradox Evaluation

Practice analyzing argument vulnerabilities and resolving complex situational paradoxes.

Q1. Argument: 'A company switched to remote work and noticed its overall utility bills dropped by 40%. Therefore, remote work is the best way to increase the company's net profits.' Which option most severely weakens this conclusion?