题目内容

”Stinky tofu stinks and smells good” is a false statement.Which law does this use()

A. Law of identity
B. Law of excluded middle
C. Law of contradiction
D. Absorption law

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Which is a proposition in the following statements()

A. Please don’t copy!
B. The sun is a planet
Can I smoke here
D. x – y = 3

What is the type of()

A. tautologies
B. contradiction
C. Nontautological satisfiable formula
D. Unable to determine

German Nazi leader goebbels once said that a lie repeated three times becomes a truth.Which law does this violate()

A. Law of double negation
B. Idempotent law
C. Associative law
DE Morgan law

Our cat either sleeps on the balcony or eats meat in the kitchen.I haven’t found it on the balcony yet, so it must be in the kitchen.What is the law of inference used()

A. Modus tollens
B. Refuse to take type
C. Disjunctive syllogism
D. Structural difficulty

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