Unsolved Mysteries

Stu was taking College Algebra. Stu's teacher saw Stu's name on the class roster last week. Stu took the College Algebra final today.

Stu's teacher discovers that Stu's name is no longer on the roster. Email to Stu bounces.

The campus online directory on the web page shows Stu as a student with status "active."

The archaic terminal client of the registration system shows that Stu was withdrawn from all Stu's classes on Tuesday. The userID of the person who withdrew Stu does not correspond to anyone who shows up in the campus online directory or in a google search restricted to the campus domain.