The absence of logic in reasoning results in the decision-making process losing its reliable foundation, and the justification for choices devolving into a set of random, superficial judgments.

The Perils of Unchecked Utilitarian Rationality

The absence of logic in reasoning results in the decision-making process losing its reliable foundation, and the justification for choices devolving into a set of random, superficial judgments. When the mind is not guided by systematic analysis and strict reason, it becomes vulnerable to a utilitarian approach that considers only immediate benefits or harms, while complex moral and long-term consequences fall outside its purview. This situation can lead to destructive decisions, where utilitarian rationality turns into an end in itself, detaching the mind from a deep and comprehensive assessment of the situation.

For example, one source illustrates this as follows:
"Just as a machine can become an instrument of destruction, so too can the mind, when deprived of the guidance of reason, easily become an instrument of malevolent will. In other words, rationalism in the pursuit of means to achieve an end may coexist with irrationalism (unreasonableness) in the nature of those ends. The contradictory combination of extreme rationalism with no less extreme irrationality is one of the most characteristic features of our age. The mind is inherently utilitarian. When utilitarianism is in the service of reason and conscience, it can only broaden the scope of undertakings. But when utilitarian discernment becomes an end in itself, it can lead to destructive consequences. For rationalistic utilitarianism renders us blind to moral considerations. For the mind, there is neither good nor evil, only benefit or harm." (source: link txt)

Thus, the absence of logic negatively affects the quality of both reasoning and decision-making, depriving them of proper verification, objective analysis, and the necessity to consider the multifaceted aspects of reality. Decisions made without a logical structure can prove unstable and capable of causing unforeseen and often destructive consequences.

Supporting citation(s):
"Just as a machine can become an instrument of destruction, so too can the mind, when deprived of the guidance of reason, easily become an instrument of malevolent will. In other words, rationalism in the pursuit of means to achieve an end may coexist with irrationalism (unreasonableness) in the nature of those ends. The contradictory combination of extreme rationalism with no less extreme irrationality is one of the most characteristic features of our age. The mind is inherently utilitarian. When utilitarianism is in the service of reason and conscience, it can only broaden the scope of undertakings. But when utilitarian discernment becomes an end in itself, it can lead to destructive consequences. For rationalistic utilitarianism renders us blind to moral considerations. For the mind, there is neither good nor evil, only benefit or harm." (source: link txt)