Usually by responding with why or how is enough. If they can reason from the bottom up, vs just saying stuff they read online, they might just be smart.
I have a few people in my network that do triathlons / ironman races. It seems like they get along with each other very well. Great mix of smart, accomplished people who are constantly trying to challenge themselves in all aspects of life. When in doubt, sign up for a triathlon club nearby.
www.joinef.com [entrepreneur first] has been wildly successful with this model since 2012. They pool together founders pre-idea a couple times a year and have them start companies together in batches. If you get investment I believe the deal is 80,000 GBP for 10% - aggressive deal but worth it considering their network.