I don't think I can call myself an evangelical Christian if I am not able to bring to the Lord and save the most challenging cases. Bringing illiterate or defenseless people to the Lord is easy; try to win an academic European atheist if you can. I already brought two of them to the Lord, and my success was due to the deployment of reason and logic. And you can win them using reason, of course! It would be self-defeating to admit that our faith cannot be defended by reason and logic, wouldn't?
I think the problem here is thinking we have anything to do with who accepts the Gospel and who rejects it. We're called to preach the Gospel (how the Holy Spirit leads you to do it). However we have no control over what people who hear it are going to do with it.John 6:44
No one can come to Me unless the Father who sent Me draw
s him; and I will raise him up at the last day.
I would reiterate this sentiment when it comes to witnessing to illiterate versus academic people.Since it's the Holy Spirit who does the work in a sinner's heart to lead them to repentance, the only credit we can take for ourselves is that of simply being willing and obedient enough to be God's mouthpiece,
It isn't our success, but the Holy Spirit's. Now it's completely possible the Holy Spirit led you to use reason and logic to witness to these people, and that's great. I fully believe the Holy Spirit knows how we should approach each person and will tell us how if we listen. Sometimes it is using Scripture. Sometimes it is reason and logic. Sometimes it's simply love and compassion and friendship. However it's done we have to remember the Holy Spirit does the real, inside work. All we are is God's mouthpiece.