※ 引述《chronodl (世界就在我眼前)》之銘言：
: 以下是一個有問題的論證:
: Anselm’s Second Version of the Ontological Argument
: 1.By definition, God is a being than which none greater can be imagined.
: 2.A being that necessarily exists in reality is greater than a being that
: does not necessarily exist.
: 3.Thus, by definition, if God exists as an idea in the mind but does not
: necessarily exist in reality, then we can imagine something that is greater
: than God.
: 4.But we cannot imagine something that is greater than God.
: 5.Thus, if God exists in the mind as an idea, then God necessarily exists in
: reality.
: 6.God exists in the mind as an idea.
: 7.Therefore, God necessarily exists in reality.
錯誤在於:
若P則Q 若Q則R
P是存在 Q是完美 R是上帝
它定義若Q則R 故得證 若P則R
Gaunilo’s Criticism就是指出R可以由別的取代
Gaunilo是用一個島 所以定義若Q則I 得到若P則I
無論我們怎麼定義: 若Q則X X可以是A~Z
我們都可得到
若P則A~Z
所以說Ontological Argument是一個無效論證
好像是循環論證中的begging the question
--
"若你不打算持有某隻股票達十年，則十分鐘也不要持有。"
"如果股市可以用理論去有效分析，我早就變成路邊的流浪漢了。
股神 巴菲特
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