| − | Liberals claim that [[virginity pledge|abstinence pledge campaigns]] are ineffective, despite powerful evidence to the contrary.<ref>http://www.heritage.org/Research/Abstinence/BG1533.cfm</ref> | + | Liberals claim that [[virginity pledge|abstinence pledge campaigns]] are ineffective, despite powerful evidence to the contrary.<ref>The Heritage Foundation, ''The Effectiveness of Abstinence Education Programs in Reducing Sexual Activity Among Youth'', by Robert E. Rector, April 8, 2002 [http://www.heritage.org/Research/Abstinence/BG1533.cfm]</ref> |