When it’s a media fabrication. From the hometown paper of the “pregnancy pact” set:

I honestly do not remember specifically using the word “pact” in my meeting with the Time magazine reporter, but I do specifically remember telling Ms. Kingsbury that my understanding was that a number of the pregnancies were intentional and that the students within this group were friendly with each other. At no time in the interview did I mention any student names nor did I breach any confidences and at the conclusion of the meeting, I told Ms. Kingsbury to leave the high school property because I did not want her to be trying to interview students.

Big difference between “a number of the pregnancies were intentional” and “pregnancy pact,” no? But the best part is this:

My only direct source of information about the intentional pregnancies at the high school was the former nurse practitioner at the Health Center. My other sources are verbal staff reports and student/staff chatter, all of which I have found to be very reliable in my experience as a principal and all of which I filter myself for accuracy and keep confidential.

His only other source was “chatter” from students. Good enough for Time!