- A very cool and succinct definition of nothing that I found fascinating - Nothing is a state in which everything is not self-identical --- "You can coherently describe a state of nothingness; it’s easy to do,” Holt told me over the phone. “It’s a state in which everything is not self-identical. If for all x, x is unequal to x; that sentence in logic describes a state of nothingness. It doesn’t help the imagination, but it doesn’t give rise to any contradictions. It can only be true if nothing exists, because if anything exists, it equals itself. ” Using scientific reasoning to understand how something emerged from nothing, Holt contends, is a physicist’s attempt to answer a metaphysical question" - [Link](https://www.vice.com/en/article/vbk5va/what-is-nothing)