Asking for help on some questions of logical reasoning If the following reasoning is valid, write the form if it is valid, and if it is invalid, explain the error Some people are not young people, so some young people are not people 2. Platypus is oviparous, platypus is Brucella, so all Brucella are oviparous 3. All laws are compulsory, so all compulsory laws are laws 4. This is syllogism, the third case, this syllogism is AAI type, this syllogism is AAI type of the third case 5. The offender is guilty of theft or robbery, and the offender is guilty of theft. Therefore, the offender is not guilty of robbery 6. If it's too hot, it's uncomfortable. If it's too cold, it's uncomfortable. It's either too hot or too cold. In a word, it's uncomfortable 7. Only by changing the price system can we enhance the vitality of enterprises

Asking for help on some questions of logical reasoning If the following reasoning is valid, write the form if it is valid, and if it is invalid, explain the error Some people are not young people, so some young people are not people 2. Platypus is oviparous, platypus is Brucella, so all Brucella are oviparous 3. All laws are compulsory, so all compulsory laws are laws 4. This is syllogism, the third case, this syllogism is AAI type, this syllogism is AAI type of the third case 5. The offender is guilty of theft or robbery, and the offender is guilty of theft. Therefore, the offender is not guilty of robbery 6. If it's too hot, it's uncomfortable. If it's too cold, it's uncomfortable. It's either too hot or too cold. In a word, it's uncomfortable 7. Only by changing the price system can we enhance the vitality of enterprises

1 is invalid, in the form of SOP → POS, which violates the rule of transposition that "the incomplete items in the premise shall not be extended in the conclusion"
2 is invalid, in the form of map Λ MAS → sap, which violates the rule of syllogism that "the incomplete items in the premise shall not be extended in the conclusion", and makes the error of minor item expansion
3. Invalid, in the form of SAP → PAS, which violates the rule of transposition that "the incomplete items in the premise shall not be extended in the conclusion"
It is valid in the form of p; Q → P ∧ Q, belonging to the combination of disyllabic reasoning
The form is: (P ∨ q) ∧ P → ~ Q. the affirmative and negative form of disjunctive inference violates the inference rules and is invalid
6 is invalid, the form is: (a → b) ∧ (C → b) ∧ (a ∨ C) → B, the form is valid, but the premise is not exhaustive, the conclusion is not necessarily available
The form is: (a ← b) ∧ ~ a → ~ B. the necessary condition hypothetical reasoning negates the antecedent and conforms to the reasoning rules
(Note: the symbol "~" in the above formula indicates negative symbol)