This: bool = nil?nil true = Ok(nil) false = Err(nil) is still booleans. Icon and Verse use failure (backtracking!) as false and all values as true

This: bool = nil?nil true = Ok(nil) false = Err(nil) is still booleans. Icon and Verse use failure (backtracking!) as false and all values as true, but you still have conditionals and boolean logic even though you don't (or may not) have a boolean type.