Economics professor: Marty’s Pizza and Checkers Pizza are the two

"conclusion to be properly drawn" are LSAT questions. You need to separate out the premises, add the right option and see if you can properly draw the conclusion. So the correct option will be sufficient to draw the conclusion.

- Marty sold coupon books to customers (free pizza from any parlour)
- Checkers refused to accept these coupons.
- Accepting them would have cost Checkers nothing and would have satisfied those of its potential customers who had purchased the coupon books.

Conclusion: Checkers’s motive in refusing to accept the coupons was simply to hurt Marty’s Pizza.

There is a gap between premises and conclusion. The premises do not say anything about hurting. How does the conclusion conclude that Checkers wanted to hurt Marty's?

(A) Any company that refuses to accept coupons issued by a competitor when doing so would satisfy some of the company’s potential customers is motivated solely by the desire to hurt that competitor.

When a company refuses to accept coupons, it does so only because it wants to hurt the competitor. Now if this is also given in the premises, then we CAN conclude that Checkers motive was to hurt Marty's because that is the only motive one can have as per this new information.

For further clarity, lets add this to our list of premises and then see:

- Marty sold coupon books to customers (free pizza from any parlour)
- Checkers refused to accept these coupons.
- Accepting them would have cost Checkers nothing and would have satisfied those of its potential customers who had purchased the coupon books.
- When a company refuses to accept coupons, it does so only because it wants to hurt the competitor.

Now can I conclude that Checkers’s motive in refusing to accept the coupons was simply to hurt Marty’s Pizza? Yes. It makes sense.

(B) Any company that wishes to hurt a competitor by refusing to accept coupons issued by that competitor will refuse to accept them even when accepting them would cost nothing and would satisfy its potential customers.

This says "if a company wants to hurt a competitor ..."
But do we know whether Checkers wanted to hurt Marty's? No we don't know. This option tells us what a business will do when it wants to hurt a competitor. It doesn't say that the only reason a business would refuse to take coupons is because it wants to hurt the competitor. Perhaps they refused to accept the coupon because their billing application accepted only cash - we don't know. So we cannot logically draw the conclusion from this.

Answer (A)