[_bin_]

A good biz guy can be worth his weight in gold. It's harder than people think to get it right: to figure out the right markets to address first and how to tweak/target your product to do so, when, how, and from whom to raise capital, at what rate to expand the team, sales and marketing stuff, etc. Doubly so if the technical co-founder isn't as good at these. It's not worth 80% of equity against 20%, but it is worth a reasonably fair share.

[dccoolgai]

Agreed. The tough thing, though, is that it's (generally) a lot easier to spot a bad engineer than a bs "ideas guy".

[vonnik]

Not for a business guy it’s not. Both sides have a hard time evaluating each other.

[csomar]

For an engineer, sure. But for a business guy, it might be a bit tricky. Though I'd say a good business guy probably has a bunch of engineering contacts.

[DonHopkins]

It behooves everyone to be able to spot a narcissist, and that eliminates a huge swath of bad "idea guys" and bad MBAs.