by mccrispy
Well, I know very well that I can possibly predict an Epidemic, but I won't know for sure when I'm going to draw one.
You
can know for absolute sure when the first is due, just not the second. You know how many cards are in each Epidemic block and you know how many cards get drawn per turn. That's all that's necessary to know that the first one must be about to come up in the next draw (in your example situation)