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1 Ded, 4|       understood, the force of demonstrations, and that it is next to
2 Ded, 4|      to all that they are real demonstrations. And finally, since many
3 Ded, 5| venture now to propose them as demonstrations of the highest certainty
4 Ded, 5|   evidence I may find in these demonstrations, I cannot therefore persuade
5 Ded, 5| geometry there are many of the demonstrations of Archimedes, Apollonius,
6 Ded, 5|        although I consider the demonstrations of which I here make use,
7 Ded, 6|        as to be esteemed exact demonstrations, of which I am assured they
8 Ded, 6|     which they find considered demonstrations by all men of genius, lest
9 Syn, 5|       certitude of geometrical demonstrations themselves is dependent