Ahoy speculation, also capitals letters.
In the most recent update (Book 2, Page 87) the Groundhog Day Predictamancer (Phil) says "I so Predict it" (like Marie has done: http://www.erfworld.com/wiki/index.php/Predictamancy)
1. Is this formally Predicting something?
a) Does this use Juice?
b) Can a caster non-formally predict something?
c) Is Prediction compulsory? (could a caster "see" a possible prediction, but not Predict it, thus acting as some sort of awkward Luckamancer)
2. What does formally Predicting do?
a) If non-formal predictions are available what are the mechanical differences?
3. Is this not prediction in the general sense of the word at all? Is "I so Predict it" an attempt to maneuver Fate on the spot so to speak.
a) and if so does it use Juice?
4. Is that dude just bluffing, and does not actually Predict it?