Don't forget "modulo".
Suppose that Nancy meant 0% except for a few special cases that she didn't think should be relevant. Then she could say, '0% modulo some special cases'.
I often use epsilon in the same informal way AdeleneDawner does, though I'm perfectly aware of the formal use. Still, I think the informal use of "modulo" is more defensible - it maps more closely to the mathematical meaning of "ignoring this particular class of ways of being different"
I would like to propose this as a thread for people to write in their predictions for the next year and the next decade, when practical with probabilities attached. I'll probably make some in the comments.