The lost don't need to be convinced of the age of the earth or the location of the ark.
They need Jesus.
Make no mistake - He can reveal Himself in a myriad of ways and He will use anything. Salvation is a spiritual matter. Even though the intellect is satisfied, it isn't intellectual. Even though the emotions are expressed and set in order, it isn't emotional.
People must be led to the Lord.
It is different for each. I have no problem with the Four Spiritual Laws or the Romans Road. I have used the Wordless Book hundreds of times. I have always found that these are only a place to start.
We don't have a factory Lord, and there is no factory salvation.
Soldier of The Cross, listen. Be ready to move in ways you have never moved before. It is not about the IQ of the listener or your own skill.
It is about the deep and penetrating work of the Holy Spirit.