Are you sure you want to leave?

Your test is still in progress. If you leave this page or go back now, all your attempt wil not be saved.

Johnny: “Dad, that jacket is too thick for the current weather; I won’t be needing it.”

Mr Mason: “Son, you need to put on a jacket before going out. It’s freezing out there. I wouldn’t want you to catch a cold.”

Which of the following sentences, if true, most weakens Mr Mason’s argument?