No child abusers are persons who belong in day-care centers. Therefore, all chil

Question

No child abusers are persons who belong in day-care centers. Therefore, all child abusers are persons who do not belong in day-care centers. ____ Some organ transplants are not sensible operations. Therefore, some organ transplants are senseless operations. No promises made under duress are enforceable contracts. Therefore, no unenforceable contracts are promises made in the absence of duress. ____ Some peaceful revolutions are episodes that erupt in violence. Therefore, some episodes that do not erupt in violence are nonpeaceful revolutions. ____ Some graffiti writers are artists relieving pent-up frustrations. Therefore, some artists relieving pent-up frustrations are graffiti writers. ____ Some fire-breathing dragons are lizards that languish in soggy climates. Therefore, some fire-breathing dragons are not lizards that flourish in soggy climates ____ All fossil fuels are unrenewable energy sources. Therefore, no fossil fuels are renewable energy sources. ____

Explanation / Answer

Solution:

No child abusers are people who belong in day-care centers.
Therefore, all child abusers are people who do not belong in day-care centers.
Ans: Obversion (E-A)
Valid
Some organ transplants are not sensible operations.
Therefore, some organs transplants are senseless operations.
Ans: Obversion (O-I)
Valid
No promises made under duress are enforceable contracts.
Therefore, some episodes that do not erupt in violence are nonpeaceful revoluntions.
Ans: Contraposition (E-E)
Invalid
Illicit Contraposition
Some peaceful revolutions are episodes that erupt in violence.
Therefore, some episodes that do not in violence are nonpeaceful revolutions.
Ans: Contraposition (I-I)
Invalid
Illicit Contraposition
Some graffiti writers are artists relieving pent-up frustrations.
Therefore, some artists relieving pent-up frustrations are graffiti writers.
Ans: Conversion (I-I)
Valid
Some fire-breathing dragons are lizards that languish in soggy climates.
Therefore, some fire-breathing dragons are not lizards that flourish in soggy climates.
Ans: Obversion (A-E)
Valid

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