I believe the root of the paradox is that there exists no distribution of two variables A,B for which: a) (A,B) always fulfills A=2B or A=0.5B and b) For any v

I believe the root of the paradox is that there exists no distribution of two variables A,B for which: a) (A,B) always fulfills A=2B or A=0.5B and b) For any value of A, the conditional probability of B=2A is equal to the conditional probability of B=0.5A.