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The best testimony of the fact of Jesus Resurrection is recorded in recovered documents of the Roman Empire by government agencts. That really seals the fact of his resurrection. Second factor is the grave of Christ was guarded by MILITARY in Jerusalem. A little experience and research on military guard duty will tell you ALL the guards were at the site with each being charged with 3 hours of duty in the night. If you have served in the military you understand this action which has been in effect forever it would seem.