Test 20 Section 3:

Page 1: "Rule 4 tells us that neither S nor U can be in the middle seat in that row"
Page 5: "By rule 1, 3 and 6 must be R."

Test 24 Section 4:

Page 3: I did not notice that it is also true that J1 must equal R2. (In other words, whatever introductory book Juarez looks at in week 1 must be the book that Rosenberg looks at in week 2.)