1. Mayers showed that ( computationally quantum ) quantum commitment is impossible : an unconditionally unlimited attacker can break any secure commitment protocol .
2. Mayers showed that quantum binding is impossible ( computationally quantum ) : an unconditionally unlimited attacker can break any secure commitment protocol .

yes

1. Ibirapuera Park is located in this subprefecture , as is the Brazilian campus of the Federal University of Sao Paulo and the headquarters of IBM .
2. Ibirapuera Park is located in this sub-prefecture , as is the main campus of the Federal University of Sao Paulo and the Brazilian headquarters of IBM .

no

1. The CEO of the AIG Advisor Group was Erica McGinnis , Interim CEO of the independent company , now Advisor Group , is Valerie Brown .
2. The CEO of AIG Advisor Group was Erica McGinnis . The interim CEO of the independent company , now called Advisor Group , is Valerie Brown .
yes