Answer:
I am a delicious way of representing data.
Open me, and you can't see me without a mirror. Close me and you can't see me at all. What am I?
I am in truth a yellow fork from tables in the sky by inadvertent fingers dropped the awful cutlery. Of mansions never quite disclosed and never quite concealed the apparatus of the dark to ignorance revealed.
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word. What am I?
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
When is it bad luck to see a black cat?