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Jaarboek Thomas Instituut 1997 - Thomas Instituut te Utrecht

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ARE GOD AND HUMAN CREATURES FREE? 117<br />

an instance of it. Knuuttila is wrong in many historical and sys<strong>te</strong>matic<br />

respects, but although Knuuttila is mainly wrong, Scotus must be<br />

wrong too, if we assume that Knuuttila's in<strong>te</strong>rpretation of Scotus is<br />

right.<br />

In fact the structure of the complica<strong>te</strong>d first objection is the same as<br />

the structure of the second objection which is less complica<strong>te</strong>d. First,<br />

a view of Knuuttila is repor<strong>te</strong>d: Knuuttila suggests that the scholastics<br />

were not aware of the difference between <strong>te</strong>mporally indefini<strong>te</strong> and<br />

defini<strong>te</strong> propositions. Second, this view is wrong: Boethius and many<br />

schoiastics following him, including <strong>Thomas</strong> Aquinas, disposed of this<br />

distinction. Boethius took into account that two contradictory<br />

propositions have to be <strong>te</strong>mporally defini<strong>te</strong>, if they are defmi<strong>te</strong>ly<br />

contradictory. "This motiva<strong>te</strong>d him to deny that propositions about<br />

future contingencies are 'defmi<strong>te</strong>ly' true" (263). Knuuttila's history of<br />

medieval modal theory is wrong, but nevertheless it is only assumed<br />

that he is right on Duns Scotus.<br />

The third objection is taken from an observation of Klaus Jacobi.<br />

"Jacobi argues that the relation which Aristotle and the Scholastics<br />

establish between modal and <strong>te</strong>nse qualifiers is not a mat<strong>te</strong>r of defining<br />

modal <strong>te</strong>rms but of using modal <strong>te</strong>rms in an argumentation" (263).<br />

<strong>Thomas</strong> Aquinas' in<strong>te</strong>rpretation of necessity is that something will<br />

always be if it is necessary, and not the other way around, and that<br />

something cannot be impeded, if it is necessary. "He does not define<br />

modal <strong>te</strong>rms ex<strong>te</strong>nsionally with respect to periods of time, but<br />

in<strong>te</strong>nsionally with regard to the nature of things" (265). So <strong>Thomas</strong><br />

defines necessity in <strong>te</strong>rms of the nature of things. This is to be<br />

conceded. However, when Knuuttila speaks in <strong>te</strong>rms of definitions he<br />

is wrong, but when the author himself speaks in <strong>te</strong>rms of definitions it<br />

must be right.<br />

The modal model of the natures of things is the conceptual background<br />

of <strong>Thomas</strong>' concept of <strong>te</strong>mporal necessity. According to general<br />

human intuitions and <strong>Thomas</strong> Aquinas the past and the present are<br />

necessary. The concept is at stake, because the <strong>te</strong>rm does not occur.<br />

"Also in those passages in which he discusses sys<strong>te</strong>matically the<br />

ambiguities in the meanings of the <strong>te</strong>rms 'possible' and 'necessary' as

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