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vol. I pars III

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Media expo.<br />

P no fcit rhagis ^ aliquid,q3 fcit: &<br />

vt magis opinc^de fcla fua,^ de re,<br />

quafciti&fiacdderet, vtfciati^m,<br />

poftcaqua id ignorauerittqfn igno<br />

ranria confequetur ipfiim, ni fi preceflcrit<br />

homo & fciueiit per ea,qu^<br />

non ignorat omnino. Quod cu ita<br />

fit, fequitur vt principia demonftrationis,aut<br />

omnia,aut qnaedam<br />

fmt magis Icita, quam conclufio,<br />

17 Et quiVult habere fcicntia demo<br />

ftratiuam perfec^am,non tm. debet<br />

habere propofitiocs ,m«^is fcitas,q<br />

codufionem, & q? veritasipfaru fit<br />

maior ^veritas condufionis,fed<br />

E oportet eria cum hoc, vt no crcdat<br />

alicui oppofito propofitionibus fa<br />

tis per fe.h^ enim funt res Sophiftifx,<br />

quas funt in fyll ogifino Sophiftico.&<br />

caufa hiiius elkqm fcienda:<br />

dcmonfhariuac proprium eft, vt<br />

non fufcipiat variadonem,&non<br />

eorrupatur,neq;exiftimet deipfa<br />

cogitas fieri pofle oppofitu eius,de<br />

quo cogitet,fi fueritfani itelle&us.<br />

1 ' la vero exiftimauerum nonnulli<br />

no efTe demonftrarione penitus, &<br />

J 9 deflruxere natura ipfius omnino:<br />

proptcreaq? arbitradfuntoporterefuper<br />

omni redemoftrationem<br />

F conftitui,quoniam videruntdifpo<br />

fitionem propofidonum demonftradonis<br />

indigeredemoflratione,<br />

quemadmodu difpofitio coclufionis<br />

per fe. Ali j vero ftabiliere naturam<br />

demonftradonis exiftimates<br />

demonftratioue coftrui fup omni<br />

re,& ambx opiuioncs funt falfx,<br />

quonia n6 funt oppofit^.Deflruen<br />

tes igitur natura demonftradonis<br />

inquiut: quonia omne indigetdemonlfcradonc,<br />

& fieri nullo mode<br />

poteft,vtpofteriora fciant'pcr fcicn<br />

dam rcrum prior u,nifi hxc priora<br />

Poft.refol.<br />

fciantur cofimiliterperprioraalia, O<br />

& hajcprioraperpriora alia, & fie<br />

ininfim'tu:fedpertra'fireinfinitunj<br />

eft impofibilerigid'no funthicprim<br />

cipia nota, qu^ afiequamur,nm per<br />

vi& pofidonis,non aute" per via naturae,qj<br />

(I non fuerintprincipia hie,<br />

non criteriademoftratio penitus.<br />

Quod igiturexiftimauerintpofte<br />

riorafciri ppriora.Sc q? fieri no poteft,vtinfinitu<br />

pertranfeamus, ver<br />

um eft ac re omnis res indiget dem6ftratione,&<br />

q? no fuht hie principia<br />

nota per fc,eftimpoffibile.<br />

Alij veroc6ceduntquidem,q?ois 10<br />

res indigec demoftratione: Scexi- H<br />

ftimant fieri pofle,vt iniieniatur dc<br />

monftratioinoibus permoduciirculi,<br />

non aut£ per modum return,<br />

quieftille,exqiiofequitur impofli<br />

bile, quodeliinfinitum pcrtrafiri.<br />

Nosautdicimus,q7 no omnis res it<br />

fcitur per demonftrationerfed funt<br />

aliqua, quae (ciiumu fine medio, &<br />

non per demonftrationf. Qjaodq;<br />

hoc ita fit, planu eft per {e. oportcc<br />

cnim cu, qui cocedit demoftrarionem<br />

cfle, vtfatcatur.ex neceffitate,<br />

q? funt hie principia fcitaperfc: &<br />

hoc,qm fi opus eft, vt (ciamus pro-, I<br />

pones demoftratioms, ant fciemus<br />

ipfasper mediii,aut fine medio.&;<br />

fi fciemus per mediu,iteru confimi<br />

liter fiet petitio de hoc,q? aut fiitur<br />

per fe, aut per medi u,& ita aut procedet<br />

res in infinitu fecundii rcilu^<br />

& no erit hie demoftraao penitus,<br />

auterunt hie principia nota per fe,<br />

aut erit demonftratio in circulum.<br />

Dixit:uoftrum aute eft, vt no *duerfemur<br />

Sophiftis,^ principia de<br />

monftradonis non funt nota per<br />

alia: fed dicamus, quod ipfa func<br />

nota

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