▁su i ▁( not ▁in ▁control ▁of ▁himself ). ▁Samuel ▁Johnson , ▁author ▁of ▁the ▁first ▁English ▁dictionary , ▁the or ized ▁that ▁the ▁word ▁nin com po op ▁may ▁derive ▁from ▁this ▁phrase . ▁| - ▁| non ▁const at || it ▁is ▁not ▁certain || U sed ▁to ▁explain ▁scientific ▁phen omena ▁and ▁religious ▁advoc ations , ▁for ▁example ▁in ▁medieval ▁history , ▁for ▁r ul ers ▁to ▁issue ▁a ▁' Non ▁Const at ' ▁dec ree , ▁b anning ▁the ▁worship ▁of ▁a ▁holy ▁figure . ▁In ▁legal ▁context , ▁occasionally ▁a ▁backing ▁for ▁null ing ▁information ▁that ▁was ▁presented ▁by ▁an ▁att orney . ▁Without ▁any ▁tang ible ▁proof , ▁Non ▁const at ▁information ▁is ▁difficult ▁to ▁argue ▁for . ▁| - ▁ ▁| non ▁du cor , ▁du co || I ▁am ▁not ▁led ; ▁I ▁lead || M otto ▁of ▁São ▁Paulo ▁city , ▁Brazil . ▁See ▁also ▁pro ▁Brasil ia ▁fi ant ▁ex im ia . ▁| - ▁| non ▁est ▁fact um || it ▁is ▁not ▁[ my ] ▁de ed || a ▁doctrine ▁in ▁contract ▁law ▁that ▁allows ▁a ▁signing ▁party ▁to ▁escape ▁performance ▁of ▁the ▁agreement . ▁A ▁claim ▁of ▁" non ▁est ▁fact um " ▁means ▁that ▁the ▁signature ▁on ▁the ▁contract ▁was ▁signed ▁by ▁mistake , ▁without ▁knowledge ▁of ▁its ▁meaning , ▁but ▁was ▁not ▁done ▁so ▁neg lig ently . ▁A ▁successful ▁ple a ▁would ▁make ▁the ▁contract ▁void ▁ab ▁init io . ▁| - ▁| non ▁est ▁prince ps