Which renaissance scientist believed that reasoning found truth and that man should search for provable knowledge?

The renaissance was a history period lasted during fifteen and sixteen centuries A.C that represents a middle point between middle and modern ages. Leonardo DaVinci, was a scientist who lived between 1452 and 1519. Leonardo was considered a genius advanced for his age and always fight against the church ideas who considered the man never would had the need to search the truch and was only necessary the belief on a superior being, while DaVinci believed the human being has the ability to find the truth and change the world for good.

albany plan of union, 1754. the albany plan of union was a plan to place the british north american colonies under a more centralized government