I'm removing "airplane tickets" from the "cheaper is more expensive" sub-topic. If the argument is "on long flights, business-class is better than economy-class," then the example should be "classes of airline tickets." And even then, I don't know if there's a consensus.
I'm removing "airplane tickets" from the "cheaper is more expensive" sub-topic. If the argument is "on long flights, business-class is better than economy-class," then the example should be "classes of airline tickets." And even then, I don't know if there's a consensus.