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1.
Internet Acronym: I Am Not An Expert

Used in conversation when it is necessary to point out that this is not your field of expertise.
Light waves CAN turn corners, in a process named 'diffraction' don't quote me though - IANAE!

Another letter is often used to denote the subject area, ie. in the above example, IANAOE could be substituted to give: I Am Not An Optical Expert!
by Ti August 19, 2004