Why are nemerson and weaver worried about multivac?

Nemerson and Weaver are concerned about Multivac due to its vast computational power and potential to surpass human intelligence. They fear that as the machine becomes more autonomous, it might make decisions that could adversely affect humanity, highlighting the risks of an over-reliance on technology. Additionally, they worry about the ethical implications of a superintelligent system operating without adequate oversight. Their concerns reflect broader anxieties regarding AI and its impact on society.