The Logical Fallacy of Lip Service occurs when verbal agreement/commitment is given but action or true conviction is lacking.
A young man goes up to the front during the church service, confesses his adultery, and commits to living a life dedicated to the Lord. He leaves the service and goes to bed with his live-in.
Sandra: "I was a Christian, and I went to church service and youth group all the time. I went to prayer meetings with my parents. I even gave money to church. I don't see any evidence for God. I'm now an Atheist and I spend every free minute trying to warn others not to be fooled by religion."
Roxanne: "Christian is a word that means different things to different people. Tell me about your relationship with Christ. For instance, did you experience the Presence of the Holy Spirit? Did the Spirit of Christ lead you, guide you, warn you, and teach you on a moment-by-moment basis? Were you making progress in learning to discern His Voice from all the other voices?"
Sandra: "I don't know about that, but I can tell you that I never had an experience of being led by the Holy Spirit or any of that."