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Farmelle
Since: Dec, 2009

What's the trope for when two similar looking, but entirely different items are confused for each other? For example, in Snuff, Vimes gets hold of a container meant to hold bodily excretions such as snot. It looks very similar to a snuff container he owns, and although it doesn't happen, he lampshades the possibility of mixing them up in an internal monologue.