When a prophet speaketh in the name of the LORD, if the thing follow not, nor come to pass, that is the thing which the LORD hath not spoken, but the prophet hath spoken it presumptuously: thou shalt not be afraid of him.
(Deuteronomy 18:22)
A true prophet is accurate to 100%,Â
A great site to read filled and unfulfilled prophecy is located here, no sense in me being redundant. They have done an excellent job. http://www.aboutbibleprophecy.com/default.htm