Part

 1 II| probable reasonings, without demonstrations), composed as they are of
 2 II|      of their most difficult demonstrations, had led me to imagine that
 3 II|   have been able to find any demonstrations, that is, any certain and
 4 IV|     I had hitherto taken for demonstrations; and finally, when I considered
 5 IV|  over some of their simplest demonstrations. ~And, in the first place,
 6 IV| consent is accorded to these demonstrations, is founded solely upon
 7 IV|      nothing at all in these demonstrations which could assure me of
 8 V |   clear and certain than the demonstrations of the geometers had formerly
 9 V |    the force of mathematical demonstrations and who are not accustomed
10 VI|     had not the most certain demonstrations, and not to give expression
11 VI|      I have since sought out demonstrations, and had thus learned them