Exercise 1.2
19. Argument (conclusion: For organisms at the sea surface, sinking into deep water usually means death.)
20. Nonargument (temporal meaning of "since"; "hence" indicates an explanation.)
21. Argument (conclusion: Dachshunds are ideal dogs for small children.)
22. Argument (conclusion: Atoms can combine to form molecules, whose properties are generally very different from those of the constituent atoms.)
23. Argument (conclusion: The coarsest type of humor is the practical joke.)
24. Nonargument (conditional statement)
25. Nonargument (explanation)
26. Argument (conclusion: Words are slippery customers.)
27. Nonargument (report)
28. Argument (conclusion: A person never becomes truly self reliant.)
29. Nonargument (opinion)
30. Nonargument (illustration)
31. This passage could be both an argument and an explanation (conclusion: In areas where rats are a problem, it is very difficult to exterminate them with bait poison.)
32. Both an argument and an explanation (conclusion: Men are less likely to develop osteoporosis until later in life than women and seldom suffer as severely.)
33. Argument (conclusion: Newspapers, radio, and television are essential for a democracy.)
34. Nonargument (loosely associated statements)
35. Argument (conclusion: The plane mirror remains an important element in the modern arsenal of sophisticated optical devices.)
Part II
1. Nonargument
2. Argument (conclusion: The emphasis on computers in elementary schools is harmful.)