Logic Quiz

During a debate, Adi states, "The sky is blue." This statement can be classified as what type of statement?

• A command that instructs someone to do something

• A statement that is always true

• A question that requires an answer

• A statement that can be true or false

Joko is planning a picnic. He thinks, 'If it rains, then the ground will be wet.' Which of the following is an example of a compound proposition?

• 2 + 2 = 4.

• It is raining.

• If it rains, then the ground is wet.

• The sky is blue.

Sri and Angga are planning a picnic. They have agreed that they will only go if both of them can attend. What does this agreement signify in terms of their attendance?

• Neither can attend the picnic

• At least one can attend the picnic

• Both must attend the picnic

• Only one can attend the picnic

Adi is planning to go for a hike. He knows that if it is sunny (p) he will go hiking, but if it is raining (q), he will stay home. What is the truth value of the statement 'If it is sunny and it is raining, then Adi will go hiking'?

• Undefined

• False

• True

• Cannot be determined

Heri is deciding whether to go to the park or stay at home. Which of the following statements about his decision is a tautology?

• Heri goes to the park OR stays at home

• Heri goes to the park AND does NOT go to the park

• Heri goes to the park OR does NOT go to the park

• Heri goes to the park AND goes to the mall

In a game, Dedi and Rizky are both trying to win a challenge. The challenge states that if both players choose to play aggressively, the outcome will be determined by the logical operation 'p XOR q'. What is the result of this operation when both Dedi and Rizky choose to play aggressively?

• Both true and false

• Undefined

• False

• True

Maya is trying to understand a concept in logic for her philosophy class. She comes across the term 'contradiction'. What does the term 'contradiction' refer to in logic?

• A statement that is always true

• A statement that can be either true or false

• A statement that is always false

• A statement that is sometimes true

Rahman is planning a picnic. He thinks, 'If it rains, then the ground is wet.'

• If it rains, then the ground is wet.

• The sun is shining.

• Close the door.

• What time is it?

Yuni is observing the weather. She thinks, 'If it rains, then the ground is wet.'

What is the contrapositive of Yuni's statement?

• If the ground is not wet, then it does not rain.

• If it rains, then the ground is not wet.

• If it does not rain, then the ground is wet.

• If the ground is wet, then it rains.

Adi will go to the beach if and only if it is sunny.

• I will not go to the beach.

• It is not sunny.

• Adi will go to the beach if and only if it is sunny.

• If it is sunny, then I will go to the beach.