I am a puzzle, a riddle, a test, With no easy answer, I'm hard to digest. A thinker’s delight, a solver’s despair, What am I, elusive, in the mind's snare?

What is so fragile it already breaks when you just say it's name?

Three words, seven letters Say it, and the key will be revealed.

When you don't know what I am, I am something, When you know what I am, I am nothing. What am I?

A word I know, six letters it contains, remove one letter and twelve remains. What is it?