Theory of Knowledge

Ahh, finally. Some honest whining. But first, I give you this problem:

Assume that:

1. All IB students are procrastinators.
2. All procrastinators are IB students.
3. I am an IB Student.

What assumption can one make about IB Student based on the assumptions listed above? (Answer found in Guide to the Obvious, page 17). Disclaimer: Statements 1 and 2 are not necessarily true, but for the sake of this problem, assume that they are.