Mailbag: Logic of minicamp in June?

I've always questioned the logic of a three-day mandatory minicamp in June. It seems to me that in three days (and really two since they didn’t practice the last day), they are just getting things started, and then it's over. Then there is a significant gap in time before the real training camp starts, and the learning and conditioning begin again. So what outcomes were the Cowboys looking for in those three days?