Grading scheme:
   a) 5 points
   b) 5 points
   c) 5 points
Total 15 points.

Common errors:

1.  Use of vague statements of the sort "Someone said something" or "People 
have been talking about flying cars for years".

2.  Claims about the physical characteristics of computers rather than 
"capacity exhibited by computers".  In some cases, students explicitly 
argued for a specific interpretation of the "capacity exhibited by 
computers" statement, and then submitted valid claims under that 
interpretation.  Some common ones:
        statements about the size of computers
        statements about the weight of computers
        statements about the number of vacuum tubes in computers
        statements about the speed of computers
        statements about the amount of memory in computers

3.  Similar to common error #2 were claims about the market for or adoption 
rate of computers were submitted.

4.  Lack of concrete comparable statements from alternative 
fields.  Alternatively sometimes quotes were give but no comparison against 
these were made.

5.  Use of science fiction writings as a claim or prediction.