Errata

Post-publication, I learned of errors in two tables in the original paper. A summary of the mistakes follows. Thanks to Otto Seppälä at Aalto University for pointing these out.

Errors in Table 2 (page 4):

• The total of "Clean Multiple" solutions should be 52 (not 43).
• The number of "Unclear" solutions for course HS should be 1 (not 0).
• The number of "Unclear" solutions for course T3Non should be 20 (not 19)
• The total of "Unclear" solutions should be 31 (not 29).

Errors in the table on page 5:

• Column "N", row "Clean Multiple" should be 52 (not 43)