No one makes it alone. But there's a reason some people can get investors or bosses to believe in them while others cannot. And that reason has little to do with experience, pedigree, or a polished business plan. Backable people seem to have a hidden quality that inspires others to take action. We often chalk this up to natural talent or charisma...either you have it; or you don't. After getting rejected by every investor he pitched, Suneel Gupta...