There is some evidence that maintains that the left brain is not much involved in:

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The left brain is traditionally associated with analytical thinking, logical reasoning, and mathematical functions. Synthesis, which involves combining different ideas or elements to form a coherent whole, is more commonly associated with the right hemisphere of the brain. This is because the right brain is thought to be more involved in creative processes, intuition, and holistic thinking.

There Is Some Evidence That Maintains That the Left Brain