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Syllogisms in philosphy

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I am having issues with a subject. I need you to answer these attached questions and explain why so I can complete other like it.

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I am trying to figure out if these are syllogisms or not. I have a bunch more to do. Can you answer questions and explain why for each

Are these valid syllogisms- Yes/No and why

1. All zebras are striped animals.
No zebras are polar bears.
Therefore, no polar bears are striped animals.
(Comment: This makes no sense. The first two sentences are speaking of zebras, which are not polar bears, that they are striped. Who knows if polar bears are striped? There is absolutely nothing to connect the appearance of polar bears with the appearance of zebras. They are two completely separate sets.)

2. All clowns are funny individuals.
Some sad people are clowns.
Therefore, some sad people are funny individuals.
(Comment: Since all clowns are funny and some "sad people" are clowns, then it must follow that some "sad people" are funny, i.e. the ones ...

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Please help with this assignment -
In very short paragraphs/ straight to the point, complete the following:

Identify and explain the fallacies of relevance in the following passage.
Nietzsche was personally more philosophical than his philosophy. His talk about power, harshness, and superb immorality was the hobby of a harmless young scholar and constitutional invalid.- George Santayana.

Identify and explain any fallacies of defective induction or of presumption in the following passage:
If you want a life full of sexual pleasures, don't graduate from college. A study to be published next month in American Demographics magazines shows that people with the most education have the least amount of sex- The Chronicle of Higher Education

Identify and explain the fallacies of ambiguity that appear in the following passage:
The basis of logic is the syllogism, consisting of a major and a minor premise and a
conclusion -- thus:
Major Premise: Sixty men can do a piece of work sixty times as quickly as one man.
Minor Premise: One man can dig a posthole in sixty seconds;
therefore --
Conclusion: Sixty men can dig a posthole in one second.
This may be called the syllogism arithmetical, in which, by combining logic and
mathematics, we obtain a double certainty and are twice blessed.

Identify and explain the fallacies of relevance of defective induction, or presumption, or ambiguity as they occur in the following passages. Explain why, in the case of some, it may be plausibly argued that what appears at first to be a fallacy is not when the argument is interpreted correctly.
Which is more useful, sun or the moon? The moon is more useful since it gives us light during the night, when it is dark, when it is dark, whereas the sun shines only in the daytime, when it is light anyway- George Gamow

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