You're over it.
The cost of rejecting yet another poorly conceived business plan by a marginal candidate is less than the potential loss of billions if the guy who comes up with THE NEXT BIG THING is too shy to apply to YC.
The poster show's self-doubt, self-awareness, the ability to self evaluate and the ability to learn as indicated by his undergrad.
So definitely the intelligence is there. Considering the poster is most likely in their early twenties, regardless of the idea, the best thing going for the person is their runway. They have the time to fail a couple of times before other life goals come into play.
And frankly, there isn't too much correlation between business success and high intelligence. Anecdotally, it can be argued that there is an inverse relationship.
You're mastering undergraduate material, which certainly doesn't give any clues as to if you are genius, but it does say you can probably build whatever you want given enough time and effort. What else does he need to know?
I wish determination was as easily spotted as the intelligence treshold.
> the key here is to try anyway and learn along the process.
This is exactly right. Keep pulling on the string and see where it takes you; if you’re as determined as you say you are, that determination will be more than enough to compensate for whatever intelligence you think you don’t have.