Sure, I'll VM you when I'm about to start.
Anyway, the example is, your character sees the sun rise during one of his visions. Depending on how symbolic you see that, it could mean anything from "Japan's going to invade" to "The sun rises in the morning", with most people assuming the latter. The plan is to make Sirius think "The sun rises in the morning" when it's really "Japan's going to invade" so to speak. Thus the vision's 100% accurate, but Sirius's interpretation was completely wrong.
How's that work for you?