ok prove three things in the bible that a jury of twelve would say are true beyond a reasonable doubt
Firstly, check out "A Case for Christ," by Lee Strobel. It's much longer than I can post here, but it makes a legal case for the complete story of Jesus Christ. There was also a similar book written by a British lawyer intent on proving that the Jesus story was bogus, but came to the conclusion that with 4 corroborating witness stories that match historically verifiable evidence, the story was true beyond a reasonable doubt. He published his book and converted to Christianity.
Next, check out "Exodus Decoded," on the History Channel and produced by James Cameron. It gives a full array of archeological evidence that supports, beyond a reasonable doubt, the Biblical account of the entire book of Exodus, from evidence of all ten plagues to the location of Mt. Sinai, to what is believed to be an actual image of the Ark of the Covenant.
The entire chronological account from the annihilation of Canaan to the conquests by other nations has been archeologically proven, and accounts of the battles are so accurate that generals throughout history have taken Bibles with them to that area of the world not (solely) for their spiritual content, but because it has a detailed account of over half of the major military actions occurring in that area and is an excellent source of battle strategy for that area.
Archeologists also tend to carry Bibles for their historical accuracy.
About the only thing people think they can prove wrong about the Bible is the age of the Earth. The problem is that the estimated Biblical age starts with the base assumption that the Jewish geneologies contain all relatives. However, ancient Jewish geneologies only record ancestors of note, and the Bible also claims that people lived hundreds of years, potentially throwing off all calculations, as people might have been able to bear (or at least father) children well past the modern 50 year average.