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Statements: Some cars are buses. Some buses are trucks. Conclusion: Some cars are trucks.
Only I follows
Only II follows
Both follow
Neither follows
Neither follows
Two particular affirmative premises (Some + Some) never yield a definite conclusion between outer terms because the middle term is never distributed.
Two particular affirmative premises (Some + Some) never yield a definite conclusion between outer terms because the middle term is never distributed.
Analyze Premise Structure
Both statements are Particular Affirmative (Some) propositions. The middle term 'buses' is undistributed in both premises.
Apply Syllogism Rules
An I-type premise combined with another I-type premise (Some + Some) cannot yield any definite conclusion between the subject and predicate.
Evaluate Conclusion
Since no direct or necessary relationship is established between cars and trucks, the conclusion 'Some cars are trucks' does not follow.
A: Only I follows is wrong since the conclusion is invalid. B: Only II follows is wrong because no second conclusion is supported. C: Both follow is wrong because neither statement guarantees a connection between cars and trucks.
D is correct because two 'Some' premises do not distribute the middle term, making any direct link between cars and trucks logically invalid.
When both given statements start with 'Some', immediately suspect 'Neither follows' unless an Either-Or complementary pair is present.