basis
Now suppose Alice is an observer for system A, and Bob is an observer for system B. If in the entangled state given above Alice makes a measurement in the 



{

|

0
⟩
,

|

1
⟩
}


{\displaystyle \{|0\rangle ,|1\rangle \}}

 eigenbasis of A, there are two possible outcomes, occurring with equal probability:
