[myshpa]

How do you know that universe is not a giant computing device?

Or you know everything there is about infinity, other universes, how and where where "the playground" is placed (what's beyond its borders), what's the origin/meaning of life and so on?

Everything is meaningless and therefore we can do what we like? Even if it has no meaning to you, are you sure (deep down) it has no meaning for the lives you're taking (with your food choices)?