Well if mathmeticians are as insane as philosophers, then math is mostly truth but partly insane as it is the product of insane people. ...Math wasn't that bad until India invented algebra and made mathematics completely abstract. Making the real unreal is DEFINITELY crazy.
Since a diamond is a rhombus and a rhombus is a shape, and shapes are geometry which is also math, we can talk about insanity and technically be on topic.
:D That was awesome to type.