In yesterday' s council election a majority of voters supported conservative candidates, and a majority of voters supported candidates who voted in favor of the antipollution act
According to Sara, most children like pies. According to Robert, most children like blueberries. So if Sara and Robert are both right, it must be that most children like pies that contain blueberries.
 Ttherefore, it must be that a majority of voters in yesterday' s council election supported conservative candidates who voted in favor of the antipollution act