From infancy, Mormon children are indoctrinated with "their" testimony. It is heard and repeated thousands of times. It involves "knowing". Notice in the following testimony how this person "knows". It is never believed.
This is a cookie-cutter testimony. This person has been brainwashed with it their whole life. Mormons change the order around sometimes but it always involves knowing that 1) Joseph Smith was a true prophet, 2) the Book of Mormon is true, 3) we have a living prophet on the earth today, 4) the Church of Jesus Christ of Latter-day Saints is the only true church, 5) god lives and loves us, and 6) being grateful that "I know" all these things.
If you've heard one testimony, you have heard them all. Check it out:
"I know that The Church of Jesus Christ of Latter-day Saints is the true church. I know that it is Christ's church restored to the earth in our day by the Prophet Joseph Smith. I know that Joseph Smith was a prophet of God and that he saw our Heavenly Father and our Savior Jesus Christ. I have a testimony that God answers our prayers, that He loves us, and that He sent His Son to die for us. I bear testimony that our Savior is our perfect example, that He did perform the atonement for us, and that through Him we all may be able to return to live with our Father in Heaven again. I am so grateful to have the Book of Mormon so that I can continually feast upon the Word of God. I know that this book is true and can give us direction in our lives. I am grateful for all scripture, including the Bible and the words of our living prophets and apostles. I know that our modern-day prophet, Thomas S. Monson, is a true prophet of God who leads and guides us in these days. I am so grateful that I have been able to grow in this knowledge through the guidance and assurance of the Holy Ghost. What a wonderful blessing it is to be a member of the church. My hope and prayer is that all might have the opportunity to gain this knowledge for themselves."
Pretty sad... and I am embarrased to admit that I spouted this crap too, almost word-for-word.
Mormons are under the false impression that repeating their testimony will make everyone have an orgasm with desire to join the church. It will confound the wise and the learned. Children will silence professors. It will trump any and all arguments that can ever be forged by the enemies of the lord.
A testimony is bullet-proof armor to a warrior, now repeat after me, "I know..."