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proved very proved very difficult proved very successful proved very useful proved vital proved what proved wrong proved yet proved you proved your point provedor proven proven ability proven accurate proven and probable proven and reliable proven and tested proven anything proven approach proven beneficial proven benefits proven business proven by science proven concept proven correct proven design proven difficult proven effective proven effectiveness proven efficacy proven efficiency proven experience proven expertise proven experts proven fact proven facts proven false proven formula proven guilty proven health proven herself proven him proven himself proven history proven i proven in court proven in practice proven ineffective proven innocent proven it proven itself proven leader proven many times proven marketing proven method proven methodology proven methods proven more proven my point proven natural proven not proven oil reserves proven once proven otherwise proven performance proven popular proven process proven processes proven product proven products proven quality proven record proven reliability proven reserves proven results proven right proven safe proven safety proven scientific proven scientifically proven skills proven so proven solution proven solutions proven strategies proven strategy proven success proven successful proven system proven technique proven techniques proven technologies proven technology proven themselves proven time proven time and again proven time and time again proven tips proven to be an effective