A handbook of logic by Joseph Gerard Brennan

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Some residents of Toulon respect poets.

O. Some dragons do not breathe fire. There is at least one x such that x is a dragon and does not breathe fire. (x)(Fx:::> Gx) (x)(Fx:::> -Gx) (3x) (Fx . Gx) (3x)(Fx' -Gx) QUESTIONS AND EXERCISES I. Which of the following are propositions? Of those that are propositions, which are simple and which are compound? I . Wallace Stevens is an American poet. 2. 0 give me a home where the buffalo roam! 3. Most bouzouki players drink ouzo. 4. Endymion either had to die or consent to eternal sleep. 5. If sodium is put in water, it will run around burning.

According to the Venn analysis, this proposition asserts only that: If there is a Platonic idea, then it is eternal. " This interpretation of general propositions is rather different from that most often used in daily discourse. For in ordinary conversation, when we assert a universal proposition, such as "All Poles are patriotic," we usually assert it together with the tacit assumption that there are such things as we are talking about. alki~~t. ---Everiln or inary language we sometimes use the nonexistential interpretation of general propositions, although instances of this usage are rather limited.

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