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19428
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Because something does exist, there must be a drive in possible things towards existence [Leibniz]
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Full Idea:
From the very fact that something exists rather than nothing, we recognise that there is in possible things, that is, in the very possibility or essence, a certain exigent need of existence, and, so to speak, some claim to existence.
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From:
Gottfried Leibniz (On the Ultimate Origination of Things [1697], p.347)
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A reaction:
I love the fact that Leibniz tried to explain why there is something rather than nothing. Bede Rundle and Dale Jacquette are similar heroes. As Leibniz tells us, contradictions have no claim to existence, but non-contradictions do.
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14381
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A statue is essentially the statue, but its lump is not essentially a statue, so statue isn't lump [Yablo, by Rocca]
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Full Idea:
Yablo proposes the argument that Statue A is essentially a statue, and Lump 1 is not essentially a statue, so Statue A is not identical with Lump 1.
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From:
report of Stephen Yablo (Identity, Essence and Indiscernibility [1987]) by Michael della Rocca - Essentialists and Essentialism I
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A reaction:
Della Rocca and Yablo unashamedly elide necessary properties with essential properties, so this argument doesn't bother me too much. It concerns the statue and the clay having different modal properties.
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23647
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Objects have an essential constitution, producing its qualities, which we are too ignorant to define [Reid]
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Full Idea:
Individuals and objects have a real essence, or constitution of nature, from which all their qualities flow: but this essence our faculties do not comprehend. They are therefore incapable of definition.
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From:
Thomas Reid (Essays on Intellectual Powers 4: Conception [1785], 1)
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A reaction:
Aha - he's one of us! I prefer the phrase 'essential nature' of an object, which is understood, I think, by everyone. I especially like the last bit, directed at those who mistakenly think that Aristotle identified the essence with the definition.
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5047
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The world is physically necessary, as its contrary would imply imperfection or moral absurdity [Leibniz]
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Full Idea:
Although the world is not metaphysically necessary, such that its contrary would imply a contradiction or logical absurdity, it is necessary physically, that is, determined in such a way that its contrary would imply imperfection or moral absurdity.
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From:
Gottfried Leibniz (On the Ultimate Origination of Things [1697], p.139)
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A reaction:
How does Leibniz know things like this? The distinction between 'metaphysical' necessity and 'natural' (what he calls 'physical') necessity is a key idea. But natural necessity is controversial. See 'Essentialism'.
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23646
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Reference is by name, or a term-plus-circumstance, or ostensively, or by description [Reid]
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Full Idea:
An individual is expressed by a proper name, or by a general word joined to distinguishing circumstances; if unknown, it may be pointed out to the senses; when beyond the reach of the senses it may be picked out by an imperfect but true description.
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From:
Thomas Reid (Essays on Intellectual Powers 4: Conception [1785], 1)
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A reaction:
[compressed] If Putnam, Kripke and Donnellan had read this paragraph they could have save themselves a lot of work! I take reference to be the activity of speakers and writers, and these are the main tools of the trade.
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19429
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The principle of determination in things obtains the greatest effect with the least effort [Leibniz]
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Full Idea:
There is always in things a principle of determination which is based on consideration of maximum and minimum, such that the greatest effect is obtained with the least, so to speak, expenditure.
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From:
Gottfried Leibniz (On the Ultimate Origination of Things [1697], p.347)
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A reaction:
This is obvious in human endeavours. Leibniz applied it to physics, producing a principle that shortest paths are always employed. It has a different formal name in modern physics, I think. He says if you make an unrestricted triangle, it is equilateral.
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