There was no Phd’s in Buddha’s time. So, I am guessing there is something else that supercedes higher education to understand the Dhamma. And, higher education might not be necessary at all.
There was a monk who couldn’t memorize one paragraph of the teaching, by the end of the paragraph, he forgot the first.
His arahant brother gave up on him. The Buddha gave him a white cloth and just wipe to clean and say clean or impermanent or something.
He attained to enlightenment seeing that the white cloth becomes dirty and thus is impermanent.
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