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19. (17) Select the reverse of the definition below and tell whether it passes the reversibility test. Michael Faraday was a successful scientist. A. A

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19. (17) Select the reverse of the definition below and tell whether it passes the reversibility test. Michael Faraday was a successful scientist. A. A successful scientist was Michael Faraday; does not pass B. A successful scientist was Michael Faraday; passes C. The only scientist was Michael Faraday; does not pass D. All scientists are named Michael Faraday; does not pass E. The most successful scientist was Michael Faraday; passes 20. an Select the set of conditional statements that represents the Venn diagram below. Two Day Shipping First Class Postage Jane's letter A. If a letter is sent using two-day shipping, then it will need first-class postage. If Jane mails a letter, then she will need first-class postage. B. If a letter uses first-class postage, then it will arrive two days after it is sent. If Jane mails a letter using first-class postage, then it will arrive two days after she sends it. C. All letters use first-class postage, so they will arrive two days after they are sent. If Jane mails a letter, then it will arrive two days after she sends it. D. If a letter uses first-class postage, then it will arrive two days after it is sent. If Jane mails a letter, then it will arrive two days after she sends it. E. The fastest way to send a letter is to use first-class postage. Jane needs her letter to arrive two days after she sends it, so she will use first-class postage. 21. an Tell whether the following argument is a valid deduction or an invalid deduction: If a car's battery is dead, then the car will not start. Paul's car will not start, so it needs a new battery. A, valid B. invalid C. Either A or B D. Not enough data to tell E. None of the above 22. (12) Tell whether the following argument is a valid deduction or an invalid deduction: If cookies are burned, then they taste bad. If Mary's cookies taste bad, then they must be burned. A, valid B. invalid C. Either A or B D. Not enough data to tell E. None of the above

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