I ran my first session of Unknown Armies the other day, and this came up. Lying is one of the standard skills that all characters get. However, it is not defined in the rules as to whether using the skill is a flat roll, or whether it should be opposed by whoever you are lying to. If this is the case, I would expect the opposed skill to be Notice, but again this is not explicitly stated. Also, what about other manipulation skills such as charm?
So, is the use of the Lying skill opposed with a skill by the target? If so what is it, and is there a general rule for this type of skill use in Unknown Armies?
Note that although I am primarily interested in RAW answers, I would also find answers that covered peoples personal experiences of house rules that cover the same ground useful.