BODMAS

Originally created to help computers and robots deal with long, bracketless sequences of mathematical operations which real people never see in real life, BODMAS has transmuted into a trap for unwitting humans, usually placed on Facebook by so-called friends.

Typical Facebook entry: I am clever because I know BODMAS and all my friends are stupid because they don't. I bet they can't get this right: 2 + 4 x 10 - mainly because I am too lazy or too ignorant to use brackets which were invented to prevent this type of ambiguity.