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Theodicy

Gottfried Wilhelm Leibniz, Freiherr von · 1710-1711 primary

passage 93 of 360 · book with much acrimony. But the accused won his case in a Synod. (32/34)

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in brief
He explains philosophical disputation as proceeding through agreed definitions, syllogistic rules, and checks for valid syllogisms; victory follows if objections break the connection to agreed principles or reduce the defender to absurdity.

in the Mystery itself. Thus something in my answer will be comprehended: but one need not of necessity comprehend all that it involves; otherwise one would comprehend the Mystery also.)

  1. M. Bayle continues thus: 'Every philosophical dispute assumes that the disputant parties agree on certain definitions' (This would be desirable, but usually it is only in the dispute itself that one reaches such a point, if the necessity arises.) 'and that they admit the rules of Syllogisms, and the signs for the recognition of bad arguments. After that everything lies in the investigation as to whether a thesis conforms mediately or immediately to the principles one is agreed upon' (which is done by means of the syllogisms of him who makes objections); 'whether the premisses of a proof (advanced by the opposer) 'are true; whether the conclusion is properly drawn; whether a four-term Syllogism has been employed; whether some aphorism of the chapter de oppositis or de sophisticis elenchis, etc., has not been violated.' (It is enough, putting it briefly, to deny some premiss or some conclusion, or finally to explain or get explained some ambiguous term.) 'One comes off victorious either by showing that the subject of dispute has no connexion with the principles which had been agreed upon' (that is to say, by showing that the objection proves nothing, and then the defender wins the case), 'or by reducing the defender to absurdity' (when all the premisses and all the conclusions are well proved). 'Now one can reduce him to that point either by showing him that the conclusions of his thesis are "yes" and "no" at once, or by constraining him to say only intelligible things in answer.' (This last embarrassment he can always avoid, because he has no need to advance new theses.) 'The aim in disputes of this kind is to throw light upon obscurities and to arrive at self-evidence.' (It is the aim of the opposer, for he wishes to demonstrate that the Mystery is false; but this cannot here be the aim of the defender, for in admitting Mystery he agrees that one cannot demonstrate it.) 'This leads to the opinion that during the course of the proceedings victory sides more or less with the defender or with the opposer, according to whether there is more or less clarity in the propositions of the one than in the propositions of the other.' (That [117] is speaking as if the defender and the opposer were equally unprotected; but the defender is like a besieged commander, covered by his defence works, and it is for the attacker to destroy them. The defender has no need here of self-evidence, and he seeks it not: but it is for the opposer to find it against him, and to break through with his batteries in order that the defender may be no longer protected.)
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topics: language, naming, and meaning · logic, method, and demonstration · reason and the intellect

Theodicy · Gottfried Wilhelm Leibniz, Freiherr von · 1710–1711