Coins can be biased, they just need to be bent so far out of shape that it's obvious. Here's a fun example: https://izbicki.me/blog/how-to-create-an-unfair-coi

Coins can be biased, they just need to be bent so far out of shape that it's obvious. Here's a fun example: https://izbicki.me/blog/how-to-create-an-unfair-coin-and-prove-it-with-math.html https://izbicki.me/blog/how-to-create-an-unfair-coin-and-pro...