They almost certainly have never studied this subject. Other sample topics could be chosen for their shock value in preparation. Using a concordance, they can look as long as they like for a phrase like: "go to heaven," or, "seven year(s) great tribulation," perhaps. "Go to church" is another phrase never occuring in Holy Writ, much to many people's surprise.
You can ask them just how would they go about studying such a topic as "hell," or, "the duration of pain," or, "what is actually said to go into the lake of fire." (Use the computer or put it on paper, proposition on top, three columns: particular element of the proposition, pro and con Scripture; maybe a page each for just a few words looked up in a concordance. This is jut a suggestion.) The use of a concordance should be obvious.
What I find is that most "Christians" don't study for themselves and don't even know how. I wasn't taught in all my years growing up in various churches. I had to learn how to do this a little bit at a time. To respect God's communication to us we must accept it is in Hebrew and Greek so we need to use tools (free on the internet) to go to the original languages at times. I found too that through the use of concordances we have the means to implement the authority of Scripture. How can it be authoritative to us if we don't know what it says? Many only go on what they've heard, never thinking to verify for themselves what it actually says. There's not very much to examine to reach a conclusion on this particular topic.
It's difficult to get most people to read anything so it is important to find something short, decisive and concise if you offer them something to read. It's all the harder to get them to read something they think is false doctrine. I've found that particular fear prevents us from grappling with things in reality, keeping us in ignorant supposition however reassuring the proponents of tradition seem. (cp., 1 John 4:5-6) If you need to understand something, go to the source. While someone else's survey may save time, it's at least once removed from what concerns us. To be an authority you have to go to the source.