Yes. You need human-level intelligence. The rest is personality characteristics (like slogging away for years), circumstances etc. But this could be said for a

Yes. You need human-level intelligence. The rest is personality characteristics (like slogging away for years), circumstances etc. But this could be said for all intellectual achievement. I would go further, and say there are no geniuses, only acts of genius. Perhaps one person "could have done" it quicker than another... but the important achievement is that someone actually did do it.