A few minutes into a 2018 talk at the University of Michigan, Ian Tobasco picked up a large piece of paper and crumpled it into a seemingly disordered ball of chaos. He held it up for the audience to ...

Imagine I present you with a line of cards labelled 1 through to n, where n is some incredibly large number. I ask you to remove a certain number of cards – which ones you choose is up to you, ...