Logical reasoning
⏱ ~3-min readAceMark GuideWhat this topic is really about
In a valid deductive argument, the logical structure guarantees that if the premises are true, the conclusion must also be true. Option B is incorrect because validity refers only to logical structure, meaning a valid argument can still have a false conclusion if one of its premises is false.
Option B weakens the argument by demonstrating that the financial burden of funding free tuition exceeds any economic benefits it generates. Conversely, Option A is incorrect because it acts as a strengthener by suggesting a positive correlation between free education and economic strength.
See the mechanism
In a valid deductive argument, the logical structure guarantees that if the premises are true, the conclusion must also be true. A diagram for this topic isn't available yet — the worked example below walks the same reasoning step by step.
An exam-style question, fully explained
A valid deductive argument has the property that:
- Identify what the question tests: A valid deductive argument has the property that:.
- In a valid deductive argument, the logical structure guarantees that if the premises are true, the conclusion must also be true.
- Option B is incorrect because validity refers only to logical structure, meaning a valid argument can still have a false conclusion if one of its premises is false.
Traps the examiner sets
- Option B is incorrect because validity refers only to logical structure, meaning a valid argument can still have a false conclusion if one of its premises is false.
- Conversely, Option A is incorrect because it acts as a strengthener by suggesting a positive correlation between free education and economic strength.
- Option A is incorrect because simply identifying what the conclusion says does not reveal the hidden logical steps required to make the argument valid.
Test your recall
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