draw the casual network for newcombs problem with perfect detection and use it t

draw the casual network for newcombs problem with perfect detection and use it to explain why the fallowing argument is valid not where the guaranteed money in the clear box is denoted by L and the larger amont of money that might be in the black box is denoted M
once a givin amount of money is put into the black box it is irreversible fixed no matter how many boxes adam might open in the future
so if eve had already put $M in the black box and if adam later opens both boxes then he will obtain $M + $L compared to obtaining only $M if the instead opens only the black box likewise if Eve had put nothing in the black box and if adam later opens only the black box the he will obtain nothing compared to $L if he instead opens both boxes
thus regardless of what eve has already done adam will obtain an additional $L if he opens both boxes instead of opening only the black box so adam is guaranteed to obtain to obtain more money by opening both boxes which therefore must be this rational decision