I used the example of a Catholic,[..] not sufficiently challenging his beliefs, as you need to get different viewpoints to make a proper perspective.
That is the type of thing that will eat at him slowly. Even if he seemed head strong and not troubled by your words, believe me, these words will make their way to his heart one day ... that is of course, Asuming he has one!
When I was a kid, I was out, alone, pioneering in August and knocked on the door of a man who changed my view of preaching. I started my presentation as always:
Me: Hello sir. My name is ....... and I am out discussing with my neighbor about...
Him (Cutting me off): What? Did you just say discuss? Realy? Discuss? You're not here to discuss, your here to preach to me. And by definition, in your mind, we are not on the same level, you think you need to share something you know that I don't and its so important to you that your here on this sunny day, at my door, rather then being out and about playing with your friends.
I don't remember the rest of the conversation, but I do remember that on that day, I started to really listen to what people had to say. It changed me.
My point is that it is possible for a house holder to say things that will change the lives of the JWs.