Sufficient AssumptionDiff: Medium
Logic Breakdown
Passage Summary: Every pin-style tool is for engraving, and some blade-style tools are too, while other blades aren't; therefore, the 'engraving' group is bigger than the 'not-engraving' group.
Conclusion: There are more etching tools used for engraving than there are etching tools not used for engraving.
Reasoning: All pin-tipped tools are used for engraving, while bladed tools are split between those used for engraving and those that are not.
Analysis: We have two categories: Pin-tipped (100% engraving) and Bladed (some engraving, some not). To guarantee that the total number of 'engraving' tools is higher than 'non-engraving' tools, we need to ensure the 'pin-tipped' group is large enough to outweigh the 'non-engraving' portion of the 'bladed' group. The gap here is the relative size of these populations. Look for an assumption that establishes there are at least as many pin-tipped tools as there are bladed tools not used for engraving.
Conclusion: There are more etching tools used for engraving than there are etching tools not used for engraving.
Reasoning: All pin-tipped tools are used for engraving, while bladed tools are split between those used for engraving and those that are not.
Analysis: We have two categories: Pin-tipped (100% engraving) and Bladed (some engraving, some not). To guarantee that the total number of 'engraving' tools is higher than 'non-engraving' tools, we need to ensure the 'pin-tipped' group is large enough to outweigh the 'non-engraving' portion of the 'bladed' group. The gap here is the relative size of these populations. Look for an assumption that establishes there are at least as many pin-tipped tools as there are bladed tools not used for engraving.
Passage Stimulus
Passage Redacted
Unlock Full Passage16.The conclusion of the argument follows logically if which one of the following is assumed?
Correct Answer
B
If there are as many pin-tipped as bladed etching tools, then Used = Pin + (some bladed) = B + (some bladed) > (the remaining bladed) = Not used. Because at least some bladed are used, the used set strictly exceeds the not-used set, so the conclusion follows.
Upgrade Your Prep
Ready to go beyond free explanations?
LSAT Perfection is the #1 modern LSAT prep platform, trusted by thousands of students for comprehensive test strategies, advanced drilling, and full analytics on every PrepTest.
Detailed explanations for 59 PrepTests
Advanced drillset builder
Personalized analytics
Built-in Wrong Answer Journal