There s one of these pseudo proofs for 1 0 too it basically goes like this 0 0 0 0 1 1 1 1 using associativity 1 1 1 1 1 1 1 1 1 1 0 0 1 What s invalid here is that the law of associativity does not hold for infinite sums that aren t absolutely convergent 00 12 25 Jun 2003 UTC