I have tried to take a stab. Please let me know if there is any gaps in the reasoning.
A contract between two parties is valid
only if one party accepts a legitimate offer from the other This is Necessary conditionContract valid --> Legitimate offer
An offer is not legitimate
if someone in the position of the party to whom it was made would reasonably believe the offer to be made in jest. This is sufficient conditionMade in jest --> Not Legitimate offer
Legitimate offer --> Not made in jest (contrapositive)
Combined
Contract valid --> Legitimate offer --> Not made in jest
OR
Made in jest --> Not Legitimate offer --> Not valid contract
(A) Joe made a legitimate offer to buy Sandy’s car and Sandy has not rejected the offer. Thus, there was a valid contract.
Reversed necessary and sufficient conditions(B) Kenta accepted Gus’s offer to buy a shipment of goods, but Gus, unknown to Kenta, made the offer in jest. Thus, the contract was not valid.
The person (Kenta) in the position of the party to whom it was made would reasonably believe the offer to be made in jest. If they don't know, we can't say anything(C) Frank’s offer to buy Mindy’s business from her was legitimate. Thus, if Mindy is a reasonable person, she will accept the offer.
There is no correlation. The prompt does say Accept offer if it is legitimate(D) Hai’s offer to sell artworks to Lea was made in such a way that no one in Lea’s position would have reasonably believed it to be made in jest. Thus, if Lea accepts the offer, they have a valid contract.
Not made in jest doesn't lead me anywhere. (E) The only offer that Sal made to Veronica was not a legitimate one. Thus, regardless of whether Sal made the offer in jest, there is no valid contract between them.
This makes sense Made in jest --> Not Legitimate offer --> Not valid contractGmatStuck
A contract between two parties is valid only if one party accepts a legitimate offer from the other; an offer is not legitimate if someone in the position of the party to whom it was made would reasonably believe the offer to be made in jest.
The principle stated above, if valid, most helps to justify the reasoning in which one of the following arguments?
(A) Joe made a legitimate offer to buy Sandy’s car and Sandy has not rejected the offer. Thus, there was a valid contract.
(B) Kenta accepted Gus’s offer to buy a shipment of goods, but Gus, unknown to Kenta, made the offer in jest. Thus, the contract was not valid.
(C) Frank’s offer to buy Mindy’s business from her was legitimate. Thus, if Mindy is a reasonable person, she will accept the offer.
(D) Hai’s offer to sell artworks to Lea was made in such a way that no one in Lea’s position would have reasonably believed it to be made in jest. Thus, if Lea accepts the offer, they have a valid contract.
(E) The only offer that Sal made to Veronica was not a legitimate one. Thus, regardless of whether Sal made the offer in jest, there is no valid contract between them.