of a mental illness known as narcissism.
A “Cerebral” Narcissist is likely to emphasise his intellect, his brainpower, his analytical skills and his rich and varied fund of knowledge.
It seems that narcissists engage in what could best be described as “Narcissistic Hedges”.
A narcissistic hedge is when a narcissistic colours more than one field of activity with his narcissistic hues. He infuses the selected subjects with Narcissistic Investment. He prepares them as auxiliary Sources of Narcissistic Supply and as backup options in case of a major system failure.
https://mental-health-matters.com/narcissism-faq-multiple-grandiosity/