CS 188's Personal Meeting Room - Shared screen with speaker view
Are all the coming written assessments going be due 11:59pm?
Can anyone provide the link of ppt?Ty
Slides link for today: https://drive.google.com/file/d/17J9EfT-dAZHh-Ow5MRMWM7MgRHh8h_R7/view?usp=sharing
couldn't the blue ghost have gone up and then down?
Is each child equal probabilities?
A minimax nested in expectimax
So pacman moves first?
why expectimax is considered optimistic?
It’s the average case vs the worst case
Yeah, but why is average case considered "optimistic"?
Because the ghost could be mastermind
We are being optimistic assuming the ghost is random
hmm makes sense
or are you thinking that optimistic means the ghost actively avoids us?
Why isn’t expectimax pacman vs adversarial ghost deterministic?
So expectimax, in this example, assumes the ghost has equal probability to move in any possible direction? ( ie 1/4 N 1/4 W 1/4 S 1/4 E )
why that same value node won't happen on random ghost
You can have two equally good options in minimax though
Why does the minimax pacman VS adversarial ghost gets lower average score than the minimax pacman VS random ghost?
So expectimax does not necessarily know what the ghost is “running”?
wait, how can minimax pacman make decisions without knowing probabilities?
I think pacman never knows what the ghost is running @david, but assumes whether the ghost is adversarial or not based on whether paceman is optimistic or not
We said earlier that we could have minimax within expectimax, and act accordingly
minimax assumes worst case @yewen
I see thank you @sunay
Would it be the most optimal then, even if it is the least efficient, to assume the opponent is "smart"
Not if you know for sure the opponent is not optimal
When was this?
is that like a dutch book argument?
so we can think of preference as a value?
how to understand continuity intuitively?
So it's kind of like the Scoville scale?
why not just U of EMV?
EMV changes based onthe lottery you define
lottery being L in this case
I don't even think we can say it's monotonic tbh. Winning the lottery seems like it usually improves peoples lives
sick economics in a cs class
So insurance companies make money by collecting the expected value margins?
what's the purpose of this example?
given you only play the lotto a few times?
"humans are not risk neutral"
but if you play it all day every like Geico, they would be equal?
law or large numbers yeehaw yep
in this slide why isn't it U(L) < EMV(L) instead of U(L) < U(EMV(L))?
how is a lottery different from a probability distribution
lottery has monatery value or utility associated with each probability
risk seeking lets go s/o the 17%
I think lottery is a specific version of a distribution
I am really risk averse
as zackoric said
We could have all picked a and divyed up the proceeds 3.2 k each
lol just make an insurance company
lol, you need really solid coordination
Go big or go home
not worth the 5% risk
I think humans collaboratively are rational
different utility functions based on probabilities
ehhh debatable zackoric
salem witch hunts
So in the backgammon example, the randomness meant that a shallow search was good enough. Or rather, a deeper search was pointless. So could the preference for certainty be a strategy to let you improve the quality of' planning?
it also depends on current wealth though, right? would a rational agent consider that?