I think that Fitzgerald's quote is a derivation of this one.
Quote:
The mark of an educated mind is that it can entertain an idea without embracing it.
- Aristotle
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So I think Fitzgerald was referring to the ability to analyse two ideas at once without adopting either whereas your garden variety schizophrenic adopts
both.
But I could be wrong on both counts. Or I could be right
and wrong on both counts.
