Famous brain teaser

[ajohn]

So reguardless of how many doors there were before, there are now two doors. Lets call them A) and B).
So the prize is behind one of those doors, so you have 50% chance of finding the prize behind door A). If it isnt there then it is behind door B) (The other 50%)

The host opens the no win door of the the remaining two. There was a 2/3 chance that the win was in that pair when the player picked their door. 3 doors so a 1/3 chance of being the correct one. 2/3 chance the win was in the other 2 doors then. The host opens the one that isn't a win so the remaining door has a 2/3 probability of being the win.

 

[Justin Passing]

Blimey, 4 pages, when it's immediately clear to some.

 

[MNW67]

Blimey, 4 pages, when it's immediately clear to some.

Indeed.

There are four sorts of people when it comes to this:

Those who never get it.

Those who see it immediately. But who often can't explain why.

Those for whom the beautiful underlying logic eventually clicks. That was me.

And those who are convinced by the 'brute force' 1,000 doors explanation without ever really understanding the underlying logic.

Also, the OP sounds like a bit of a prat.

 

[SPLINE]

the OP sounds like a bit of a prat.

I agree.

 

[Odds]

Indeed.

There are four sorts of people when it comes to this:

Those who never get it.

Those who see it immediately. But who often can't explain why.

Those for whom the beautiful underlying logic eventually clicks. That was me.

And those who are convinced by the 'brute force' 1,000 doors explanation without ever really understanding the underlying logic.

Also, the OP sounds like a bit of a prat.

 

[IT Minion]

And those who are convinced by the 'brute force' 1,000 doors explanation without ever really understanding the underlying logic

Oi! The brute force approach is a way to illustrate the underlying logic thank you very much

 

[MNW67]

Oi! The brute force approach is a way to illustrate the underlying logic thank you very much

I know!

It's a way for someone like you, who properly understands the problem, to explain the underlying logic to someone who still can't see it. But I think many people who hear that explanation become 'convinced' it is right, without ever really having the wonderful lightbulb moment where they 'know' it is right.

 

[Justin Passing]

When I read the post I didn't remember it or realise it was old, and the second post, which is mine with the answer, was off the screen.
I'm sure it took a few more seconds to get it than it had first time!

I can do stuff like this, but show me a TV drama, and 3 episodes in, I don't remember who the hell anyone is.....

 

[Odds]

I know!

It's a way for someone like you, who properly understands the problem, to explain the underlying logic to someone who still can't see it. But I think many people who hear that explanation become 'convinced' it is right, without ever really having the wonderful lightbulb moment where they 'know' it is right.

I just found it amusing you decided to respond after three years for no particular reason.


That is all.

 

[MNW67]

I just found it amusing you decided to respond after three years for no particular reason.


That is all.

The other day I was discussing the Monty Hall problem with a colleague — specifically the different ways people come to understand it, and what that might reveal about learning patterns more generally. It reminded me that this was one of the first threads I ever started. Also, the chance for a little self-mockery was too good to pass up.

 

[Odds]

The other day I was discussing the Monty Hall problem with a colleague — specifically the different ways people come to understand it, and what that might reveal about learning patterns more generally. It reminded me that this was one of the first threads I ever started. Also, the chance for a little self-mockery was too good to pass up.

hmmm: yeah, well the next time one of those fkng trolls scurries along to call me sly i'll point 'em in your fking direction.

 

[pete01]

What car is it?

 

[pete01]

If you know the one door the host opens is not the car why isnt it just 50/50 between the other two doors?

 

[IT Minion]

If you know the one door the host opens is not the car why isnt it just 50/50 between the other two doors?

The puzzle is trying to trick you into thinking that you're starting fresh after he opens the empty door so you ignore everything you knew already.

 

[pete01]

The puzzle is trying to trick you into thinking that you're starting fresh after he opens the empty door so you ignore everything you knew already.

Nope I dont get it