Are these arguments valid?
If time travel is possible, we would now have lots of time-travel visitors from the future. But we have no such visitors. So time travel is not possible.
Jen is either in San Diego or in Tokyo. Since she is not in Tokyo, she is in San Diego.
Some people are nice. Some people are rich. So some people are rich and nice.
Answer: This is valid. If having visitors from the future is necessary for the possibility of time travel and there are no visitors from the future, it follows that time travel is impossible.
Answer: This is valid. If Jen must be in one of two places and happens not to be in one
of the places, Jen must be in the other place.
Answer: This is not valid. Those who are rich might not be the same as those who are
nice.
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Which of these has contributed to a loss of meaning?
a. Copernicus's theory of a sun-centered universe b. Freud's theory of unconscious urges c. Darwin's theory of evolution d. All of the above
The twentieth century physicist Albert Einstein agreed with Spinoza that
a. God is a personal God who considered all the possibilities before freely choosing this world. b. because God is creative, he placed randomness and creativity in the world. c. the world is a logically determined order known through reason. d. science has made religion and God obsolete.
Which of the following statements about Habermas is true?
a. He believed that we can make judgments dispassionately. b. He believed that we are always impartial. c. He believed that when it comes to judgments, we are always embedded in our worldview. d. A and B
Sartre rejected the distinction between philosophical concerns and everyday life
Indicate whether the statement is true or false