Hello, for the Vienna.rb April meetup I’ve put together talk notes on: The State of Bool in Ruby - Everything Your Never Wanted to Know . The contents reads: Trivia Quiz - The States of Bool ++ Bool Basics / Classes, Classes, Classes // Truthy and Falsy - (Almost) Everything is True // The state of built-in bool conversions - to_s, to_i, to_b, to_bool and so on. Happy coding in ruby with (or without) Bool. Cheers. Prost.