If you are a lawyer, you need to make clear that something you say isn't "legal advice" because you can otherwise be held accountable for it. I think the "IANA

If you are a lawyer, you need to make clear that something you say isn't "legal advice" because you can otherwise be held accountable for it. I think the "IANAL" disclaimer is just a step beyond that so non-lawyers can't be mistaken for acting as lawyers giving out legal advice (not sure what liabilities that would entail).