Unfair Coin Flip

[Edwardo Piet]

So this is just a succession of normal coin flips... each flip having the exact same % for each side. And if one side is unfair and you're not allowed to modify it then it will always be unfair by definition. Otherwise it wasn't unfair in the first place.

[Silver]

What if I told you you could perform a fair coin flip relatively simply in a small number of flips, certainly not taking "years".

Then I'd ask you to tell me how it is done. Guessing is not my forte.

[Tiberius]

If I'm being told I have to flip a coin the normal way that is completely unfair for coin flipping the normal way by definition and end with a result that isn't completely unfair.... that sounds to me like being told to make a square circle.

Well you need to "simulate" a fair flip. I'm not saying you need to flip the coin the normal way (i.e. once) and get a fair result, because yes that is impossible. However there is a method where you can get a fair result from flipping the coin.

[Edwardo Piet]

If this is a normal coin (i.e. not a trick question) with heads on one side and tails on the other... and it's not fair... say heads has a 60% chance. Then each flip heads has a 60% chance. It's an unfair coin. Doesn't matter how you flip it, it's either an unfair coin or it's not.

[Tiberius]

What if I told you you could perform a fair coin flip relatively simply in a small number of flips, certainly not taking "years".

Then I'd ask you to tell me how it is done. Guessing is not my forte.

I'm hoping someone will get the solution, but I will reveal it if someone doesn't.

[Brian37]

Meh, lets be originalists, flip livestock, after all there was a time before coins and printed money. Grab the goat, or oxen or cow and flip them.

[Tiberius]

If this is a normal coin (i.e. not a trick question) with heads on one side and tails on the other... and it's not fair... say heads has a 60% chance. Then each flip heads has a 60% chance. It's an unfair coin. Doesn't matter how you flip it, it's either an unfair coin or it's not.

There's a flipping method which resolves the unfairness without you having to know which side is unfair. I promise you.

[Edwardo Piet]

If I'm being told I have to flip a coin the normal way that is completely unfair for coin flipping the normal way by definition and end with a result that isn't completely unfair.... that sounds to me like being told to make a square circle.

Well you need to "simulate" a fair flip. I'm not saying you need to flip the coin the normal way (i.e. once) and get a fair result, because yes that is impossible. However there is a method where you can get a fair result from flipping the coin.

Oh. So you don't have to flip it the normal way. Hmm. I have no idea then but I can imagine that can be done somehow. I dunno what the simulation would involve.

I can't use an online coin flipper because I have to use the same coin. I can't create a holographic version of it that's fair instead of unfair because that's not using the same coin. I have no idea.

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If this is a normal coin (i.e. not a trick question) with heads on one side and tails on the other... and it's not fair... say heads has a 60% chance. Then each flip heads has a 60% chance. It's an unfair coin. Doesn't matter how you flip it, it's either an unfair coin or it's not.

There's a flipping method which resolves the unfairness without you having to know which side is unfair. I promise you.

The "" Makes me think it was a trick question

[Silver]

My last guess:

Use a coin that has both heads and tails on each side?

[Tiberius]

My last guess:

Use a coin that has both heads and tails on each side?

How would that help?

Also, no. The coin is a standard coin with heads/tails. It's completely normal in that regard.