§46. _Circumfusa sint_: Goer. retains the MSS. _sunt_ on the ground that the clause _quanta sint_ is inserted παρενθετικως! Orelli actually follows him. For the phrase cf. 122 _circumfusa tenebris_. _Interrogationibus_: cf. I. 5 where I showed that the words _interrogatio_ and _conclusio_ are convertible. I may add that in Sextus pure syllogisms are very frequently called ερωτησεις, and that he often introduces a new argument by ερωταται και τουτο, when there is nothing interrogatory about the argument at all. _Dissolvere_: απολυεσθαι in Sext. _Occurrere_: cf. 44. §47. _Confuse loqui_: the mark of a bad dialectician, affirmed of Epicurus in _D.F._ II. 27. _Nulla sunt_: on the use of _nullus_ for _non_ in Cic. cf. Madv. _Gram._ 455 obs. 5. The usage is mostly colloquial and is very common in Plaut. and Terence, while in Cic. it occurs mostly in the Letters. _Inaniter_: cf. 34. There are two ways in which a sensation may be false, (1) it may come from one really existent thing, but be supposed by the person who feels it to be caused by a totally different thing, (2) it may be a mere φαντασμα or αναπλασμα της διανοιας, a phantom behind which there is no reality at all. _Quae in somnis videantur_: for the support given by Stoics to all forms of divination see Zeller 166, _De Div._ I. 7, etc. _Quaerunt_: a slight anacoluthon from _dicatis_ above. _Quonam modo ... nihil sit omnino_: this difficult passage can only be properly explained in connection with 50 and with the general plan of the Academics expounded in 41. After long consideration I elucidate it as follows. The whole is an attempt to prove the proposition announced in 41 and 42 viz. _omnibus veris visis adiuncta esse falsa_. The criticism in 50 shows that the argument is meant to be based on the assumption known to be Stoic, _omnia deum posse_. If the god can manufacture (_efficere_) sensations which are false, but probable (as the Stoics say he does in dreams), why can he not manufacture false sensations which are so probable as to closely resemble true ones, or to be only with difficulty distinguishable from the true, or finally to be utterly indistinguishable from the true (this meaning of _inter quae nihil sit omnino_ is fixed by 40, where see n.)? _Probabilia_, then, denotes false sensations such as have only a slight degree of resemblance to the true, by the three succeeding stages the resemblance is made complete. The word _probabilia_ is a sort of tertiary predicate after _efficere_ ("to manufacture so as to be probable"). It _must not be repeated_ after the second _efficere_, or the whole sense will be inverted and this section placed out of harmony with 50. _Plane proxime_: = _quam proxime_ of 36.