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Just as it is unrealistic to expect the police to stop violence flowing from the decay of inner-city neighborhoods , it is silly to think that rifle-toting Guardsmen , riding around in jeeps with no idea of what they are expected to do , will make people safer . It is unreasonable to expect the individual programs to independently improve the quality of service delivery and evaluation . We can no longer afford to expect the CDC or government to end this conflict , or allow them to prevent us from ending it . If Burt Rutan 's prediction of affordable orbital tourism in 25 years is correct , however , it 's reasonable to expect the first orbital colony to be built within about 50 years . But these resources are limited , and it is not a good investment of these resources to expect the teachers to give so much help that they have essentially delivered a private version of KCMA to each student who needs it .