Logic is the science of the justification of conclusions we have reached by natural reasoning. My point is that, for such natural reasoning to occur, consciousness is not necessary. The very reason we need logic at all is because most reasoning is not conscious at all.

Julian Jaynes
About This Quote

In the quote above, Bertrand Russell explains that logic is the science of the justification of conclusions we have reached by natural reasoning. “The very reason we need logic at all is because most reasoning is not conscious at all.” Russell also points out that “consciousness is not necessary.” His point is that consciousness doesn't make logical thinking more efficient -- it's not an essential part of the reasoning process. It's simply another tool our brain uses to arrive at conclusions, along with other tools like deduction and induction.

Source: The Origin Of Consciousness In The Breakdown Of The Bicameral Mind

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