The Bible is 100% truth no matter what. The KJV Bible that is.

"Sanctify them through thy truth: thy word is truth." John 17:17

"And ye shall know the truth, and the truth shall make you free." John 8:32

"All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness." 2 Timothy 3:16 

"Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me." John 14:6