Answer:
I am in the past, never in the future. I don't exist, but have existed. I saw what you saw, and this is what I will ever see. What am I?
What building has the most stories?
I can go through glass without breaking it.
You throw away my outside you cook my inside. Then you eat my outside and you throw away my inside.
I am a precious stone, as clear as a diamond. Though you can walk on water with my power, try to keep me, and I'll vanish in an hour. What am I?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?