You can suspect Witnesses are lying if they answer NO to the following questions:
1 Are there any aspects of your religion that trouble you or perhaps make you uncomfortable?
2 Would you say that all other religions are essentially satanic or part of Satan's kingdom?
3. Do you believe that God is planning to destroy all other religions including the churches of Christendom along with their clergy and supporters?
4. Do you believe, perhaps with rare exceptions, that only faithful Jehovah's Witnesses have a scriptural hope of surviving Armageddon?
5. Do you believe that Jehovah's Witnesses who willfully and unrepentantly accept blood transfusions forfeit the hope of gaining eternal life?
You can suspect Witnesses are lying if they answer YES to the following questions:
6. Would you say that Witnesses are free to question and even disagree with what comes down from your religion's headquarters? (without repercussion?)
7. Do you know of any honorable way for a Jehovah's Witness to leave your religion? (In other words, can people leave the religion with their reputation intact?)
8. Do you believe that adult Jehovah's Witnesses, who either leave or are disfellowshipped from your religion, should not be shunned?
9. If you somehow lost faith in your religion's primary leadership, would you keep your faith in God and the Bible?
10. Do you believe that the gospel Jehovah's Witnesses preach is the same gospel that Paul preached?