[ ^8i ] 



And here for the fake of perfpicuity it may be proper to 

 notice a few general circumftances in which this affurance arifes, 

 and which ferve to diftinguifh it into diftind fpecies. 



The firii \s meiaphjjical cerU'mty, which is commonly attended 

 with, and grounded upon, evidence. This attends our adual 

 fenfations and other perceptions, and the clear and diflind 

 memory of the paft, and all demonftrative reafonings deduced 

 from our perceptions, &c. 



The fecond is pbyjlcal ccita'mty, which is feldom attended with 

 evidence; of this nature is the affurance that attends the belief 

 or expedation of any future phyfical fad. 



The third is moral certainty, which attends felf-evident or 

 demonftrative moral truths, and frequently the belief of the paft 

 or future adions of rational agents. It is often grounded uponj 

 but often alfo unaccompanied by, evidence. 



The fourth is of a mixed nature, regarding paft or diftant 

 phyfical fads, which we have never experienced, and is grounded 

 partly on their conformity with our own experience, and partly 

 on teftimony. Sometimes the one, and fometimes the other, is the 

 predominant ingredient that produces this -certainty. I now 

 return to Mr. Hume, 



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