It’s more like 51/49 on average. The side that starts facing up has an advantage, the coin spends more time in that state.
http://www.codingthewheel.com/archives/the-coin-flip-a-fundamentally-unfair-proposition
but how do you determine which side faces up? that’s a coin toss too no? theoretically, its 50%…in actuality, it may not be…
No, you have to do a pre-pre-coin toss to determine which side is up. That’s the only way.